app.py

import gradio as gr
from gradio_client import Client, handle_file
import spaces

import os
os.environ["OPENCV_IO_ENABLE_OPENEXR"] = '1'
os.environ["PYTORCH_CUDA_ALLOC_CONF"] = "expandable_segments:True"
os.environ["ATTN_BACKEND"] = "flash_attn_3"
os.environ["FLEX_GEMM_AUTOTUNE_CACHE_PATH"] = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'autotune_cache.json')
os.environ["FLEX_GEMM_AUTOTUNER_VERBOSE"] = '1'
from datetime import datetime
import shutil
import cv2
from typing import *
import torch
import numpy as np
from PIL import Image
import base64
import io
import tempfile
from trellis2.modules.sparse import SparseTensor
from trellis2.pipelines import Trellis2ImageTo3DPipeline
from trellis2.renderers import EnvMap
from trellis2.utils import render_utils
import o_voxel
import trimesh


MAX_SEED = np.iinfo(np.int32).max
TMP_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'tmp')
MODES = [
    {"name": "Normal", "icon": "assets/app/normal.png", "render_key": "normal"},
    {"name": "Clay render", "icon": "assets/app/clay.png", "render_key": "clay"},
    {"name": "Base color", "icon": "assets/app/basecolor.png", "render_key": "base_color"},
    {"name": "HDRI forest", "icon": "assets/app/hdri_forest.png", "render_key": "shaded_forest"},
    {"name": "HDRI sunset", "icon": "assets/app/hdri_sunset.png", "render_key": "shaded_sunset"},
    {"name": "HDRI courtyard", "icon": "assets/app/hdri_courtyard.png", "render_key": "shaded_courtyard"},
]
STEPS = 8
DEFAULT_MODE = 3
DEFAULT_STEP = 3


css = """
/* Overwrite Gradio Default Style */
.stepper-wrapper {
    padding: 0;
}
.stepper-container {
    padding: 0;
    align-items: center;
}
.step-button {
    flex-direction: row;
}
.step-connector {
    transform: none;
}
.step-number {
    width: 16px;
    height: 16px;
}
.step-label {
    position: relative;
    bottom: 0;
}
.wrap.center.full {
    inset: 0;
    height: 100%;
}
.wrap.center.full.translucent {
    background: var(--block-background-fill);
}
.meta-text-center {
    display: block !important;
    position: absolute !important;
    top: unset !important;
    bottom: 0 !important;
    right: 0 !important;
    transform: unset !important;
}
/* Previewer */
.previewer-container {
    position: relative;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    width: 100%;
    height: 722px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.previewer-container .tips-icon {
    position: absolute;
    right: 10px;
    top: 10px;
    z-index: 10;
    border-radius: 10px;
    color: #fff;
    background-color: var(--color-accent);
    padding: 3px 6px;
    user-select: none;
}
.previewer-container .tips-text {
    position: absolute;
    right: 10px;
    top: 50px;
    color: #fff;
    background-color: var(--color-accent);
    border-radius: 10px;
    padding: 6px;
    text-align: left;
    max-width: 300px;
    z-index: 10;
    transition: all 0.3s;
    opacity: 0%;
    user-select: none;
}
.previewer-container .tips-text p {
    font-size: 14px;
    line-height: 1.2;
}
.tips-icon:hover + .tips-text { 
    display: block;
    opacity: 100%;
}
/* Row 1: Display Modes */
.previewer-container .mode-row {
    width: 100%;
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.previewer-container .mode-btn {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0.5;
    transition: all 0.2s;
    border: 2px solid #ddd;
    object-fit: cover;
}
.previewer-container .mode-btn:hover { opacity: 0.9; transform: scale(1.1); }
.previewer-container .mode-btn.active {
    opacity: 1;
    border-color: var(--color-accent);
    transform: scale(1.1);
}
/* Row 2: Display Image */
.previewer-container .display-row {
    margin-bottom: 20px;
    min-height: 400px;
    width: 100%;
    flex-grow: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}
.previewer-container .previewer-main-image {
    max-width: 100%;
    max-height: 100%;
    flex-grow: 1;
    object-fit: contain;
    display: none;
}
.previewer-container .previewer-main-image.visible {
    display: block;
}
/* Row 3: Custom HTML Slider */
.previewer-container .slider-row {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 0 10px;
}
.previewer-container input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    max-width: 400px;
    background: transparent;
}
.previewer-container input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 8px;
    cursor: pointer;
    background: #ddd;
    border-radius: 5px;
}
.previewer-container input[type=range]::-webkit-slider-thumb {
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: var(--color-accent);
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -6px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
    transition: transform 0.1s;
}
.previewer-container input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}
/* Overwrite Previewer Block Style */
.gradio-container .padded:has(.previewer-container) {
    padding: 0 !important;
}
.gradio-container:has(.previewer-container) [data-testid="block-label"] {
    position: absolute;
    top: 0;
    left: 0;
}
/* Viewer toolbar */
.viewer-toolbar {
    display: flex;
    gap: 10px;
    align-items: center;
    padding: 8px 0;
    flex-wrap: wrap;
}
.viewer-toolbar label {
    font-size: 13px;
    color: var(--body-text-color);
}
"""


head = """
<script>
    function refreshView(mode, step) {
        const allImgs = document.querySelectorAll('.previewer-main-image');
        for (let i = 0; i < allImgs.length; i++) {
            const img = allImgs[i];
            if (img.classList.contains('visible')) {
                const id = img.id;
                const [_, m, s] = id.split('-');
                if (mode === -1) mode = parseInt(m.slice(1));
                if (step === -1) step = parseInt(s.slice(1));
                break;
            }
        }
        allImgs.forEach(img => img.classList.remove('visible'));
        const targetId = 'view-m' + mode + '-s' + step;
        const targetImg = document.getElementById(targetId);
        if (targetImg) {
            targetImg.classList.add('visible');
        }
        const allBtns = document.querySelectorAll('.mode-btn');
        allBtns.forEach((btn, idx) => {
            if (idx === mode) btn.classList.add('active');
            else btn.classList.remove('active');
        });
    }

    function selectMode(mode) {
        refreshView(mode, -1);
    }

    function onSliderChange(val) {
        refreshView(-1, parseInt(val));
    }
</script>
"""


empty_html = f"""
<div class="previewer-container">
    <svg style=" opacity: .5; height: var(--size-5); color: var(--body-text-color);"
    xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" class="feather feather-image"><rect x="3" y="3" width="18" height="18" rx="2" ry="2"></rect><circle cx="8.5" cy="8.5" r="1.5"></circle><polyline points="21 15 16 10 5 21"></polyline></svg>
</div>
"""


def image_to_base64(image):
    buffered = io.BytesIO()
    image = image.convert("RGB")
    image.save(buffered, format="jpeg", quality=85)
    img_str = base64.b64encode(buffered.getvalue()).decode()
    return f"data:image/jpeg;base64,{img_str}"


def start_session(req: gr.Request):
    user_dir = os.path.join(TMP_DIR, str(req.session_hash))
    os.makedirs(user_dir, exist_ok=True)


def end_session(req: gr.Request):
    user_dir = os.path.join(TMP_DIR, str(req.session_hash))
    shutil.rmtree(user_dir)


def remove_background(input: Image.Image) -> Image.Image:
    with tempfile.NamedTemporaryFile(suffix='.png') as f:
        input = input.convert('RGB')
        input.save(f.name)
        output = rmbg_client.predict(handle_file(f.name), api_name="/image")[0][0]
        output = Image.open(output)
        return output


def preprocess_image(input: Image.Image) -> Image.Image:
    has_alpha = False
    if input.mode == 'RGBA':
        alpha = np.array(input)[:, :, 3]
        if not np.all(alpha == 255):
            has_alpha = True
    max_size = max(input.size)
    scale = min(1, 1024 / max_size)
    if scale < 1:
        input = input.resize((int(input.width * scale), int(input.height * scale)), Image.Resampling.LANCZOS)
    if has_alpha:
        output = input
    else:
        output = remove_background(input)
    output_np = np.array(output)
    alpha = output_np[:, :, 3]
    bbox = np.argwhere(alpha > 0.8 * 255)
    bbox = np.min(bbox[:, 1]), np.min(bbox[:, 0]), np.max(bbox[:, 1]), np.max(bbox[:, 0])
    center = (bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2
    size = max(bbox[2] - bbox[0], bbox[3] - bbox[1])
    size = int(size * 1)
    bbox = center[0] - size // 2, center[1] - size // 2, center[0] + size // 2, center[1] + size // 2
    output = output.crop(bbox)
    output = np.array(output).astype(np.float32) / 255
    output = output[:, :, :3] * output[:, :, 3:4]
    output = Image.fromarray((output * 255).astype(np.uint8))
    return output


def pack_state(latents: Tuple[SparseTensor, SparseTensor, int]) -> dict:
    shape_slat, tex_slat, res = latents
    return {
        'shape_slat_feats': shape_slat.feats.cpu().numpy(),
        'tex_slat_feats': tex_slat.feats.cpu().numpy(),
        'coords': shape_slat.coords.cpu().numpy(),
        'res': res,
    }


def unpack_state(state: dict) -> Tuple[SparseTensor, SparseTensor, int]:
    shape_slat = SparseTensor(
        feats=torch.from_numpy(state['shape_slat_feats']).cuda(),
        coords=torch.from_numpy(state['coords']).cuda(),
    )
    tex_slat = shape_slat.replace(torch.from_numpy(state['tex_slat_feats']).cuda())
    return shape_slat, tex_slat, state['res']


def get_seed(randomize_seed: bool, seed: int) -> int:
    return np.random.randint(0, MAX_SEED) if randomize_seed else seed


@spaces.GPU(duration=120)
def image_to_3d(
    image: Image.Image,
    seed: int,
    resolution: str,
    ss_guidance_strength: float,
    ss_guidance_rescale: float,
    ss_sampling_steps: int,
    ss_rescale_t: float,
    shape_slat_guidance_strength: float,
    shape_slat_guidance_rescale: float,
    shape_slat_sampling_steps: int,
    shape_slat_rescale_t: float,
    tex_slat_guidance_strength: float,
    tex_slat_guidance_rescale: float,
    tex_slat_sampling_steps: int,
    tex_slat_rescale_t: float,
    req: gr.Request,
    progress=gr.Progress(track_tqdm=True),
) -> str:
    outputs, latents = pipeline.run(
        image,
        seed=seed,
        preprocess_image=False,
        sparse_structure_sampler_params={
            "steps": ss_sampling_steps,
            "guidance_strength": ss_guidance_strength,
            "guidance_rescale": ss_guidance_rescale,
            "rescale_t": ss_rescale_t,
        },
        shape_slat_sampler_params={
            "steps": shape_slat_sampling_steps,
            "guidance_strength": shape_slat_guidance_strength,
            "guidance_rescale": shape_slat_guidance_rescale,
            "rescale_t": shape_slat_rescale_t,
        },
        tex_slat_sampler_params={
            "steps": tex_slat_sampling_steps,
            "guidance_strength": tex_slat_guidance_strength,
            "guidance_rescale": tex_slat_guidance_rescale,
            "rescale_t": tex_slat_rescale_t,
        },
        pipeline_type={
            "512": "512",
            "1024": "1024_cascade",
            "1536": "1536_cascade",
        }[resolution],
        return_latent=True,
    )
    mesh = outputs[0]
    mesh.simplify(16777216)  # nvdiffrast limit — preview only
    images = render_utils.render_snapshot(mesh, resolution=1024, r=2, fov=36, nviews=STEPS, envmap=envmap)
    state = pack_state(latents)
    torch.cuda.empty_cache()

    # --- HTML Construction ---
    images_html = ""
    for m_idx, mode in enumerate(MODES):
        for s_idx in range(STEPS):
            unique_id = f"view-m{m_idx}-s{s_idx}"
            is_visible = (m_idx == DEFAULT_MODE and s_idx == DEFAULT_STEP)
            vis_class = "visible" if is_visible else ""
            img_base64 = image_to_base64(Image.fromarray(images[mode['render_key']][s_idx]))
            images_html += f"""
                <img id="{unique_id}"
                     class="previewer-main-image {vis_class}"
                     src="{img_base64}"
                     loading="eager">
            """

    btns_html = ""
    for idx, mode in enumerate(MODES):
        active_class = "active" if idx == DEFAULT_MODE else ""
        btns_html += f"""
            <img src="{mode['icon_base64']}"
                 class="mode-btn {active_class}"
                 onclick="selectMode({idx})"
                 title="{mode['name']}">
        """

    full_html = f"""
    <div class="previewer-container">
        <div class="tips-wrapper">
            <div class="tips-icon">💡Tips</div>
            <div class="tips-text">
                <p>● <b>Render Mode</b> - Click on the circular buttons to switch between different render modes.</p>
                <p>● <b>View Angle</b> - Drag the slider to change the view angle.</p>
            </div>
        </div>
        <div class="display-row">
            {images_html}
        </div>
        <div class="mode-row" id="btn-group">
            {btns_html}
        </div>
        <div class="slider-row">
            <input type="range" id="custom-slider" min="0" max="{STEPS - 1}" value="{DEFAULT_STEP}" step="1" oninput="onSliderChange(this.value)">
        </div>
    </div>
    """

    return state, full_html


@spaces.GPU(duration=120)
def extract_glb(
    state: dict,
    decimation_target: int,
    texture_size: int,
    req: gr.Request,
    progress=gr.Progress(track_tqdm=True),
) -> Tuple[str, str, str, str]:
    """
    Extract GLB (with texture) + Raw STL (4M faces, no decimation/texture) in one pass.
    """
    user_dir = os.path.join(TMP_DIR, str(req.session_hash))
    shape_slat, tex_slat, res = unpack_state(state)
    mesh = pipeline.decode_latent(shape_slat, tex_slat, res)[0]

    now = datetime.now()
    timestamp = now.strftime("%Y-%m-%dT%H%M%S") + f".{now.microsecond // 1000:03d}"
    os.makedirs(user_dir, exist_ok=True)

    # --- Raw STL first (before simplify destroys detail) ---
    mesh.simplify(4000000)  # 4M faces — preserves detail, manageable file size
    raw_stl_path = os.path.join(user_dir, f'raw_{timestamp}.stl')
    raw_mesh = trimesh.Trimesh(
        vertices=mesh.vertices.cpu().numpy(),
        faces=mesh.faces.cpu().numpy(),
        process=False,
    )
    raw_mesh.export(raw_stl_path)

    # --- GLB with texture (standard extraction) ---
    glb = o_voxel.postprocess.to_glb(
        vertices=mesh.vertices,
        faces=mesh.faces,
        attr_volume=mesh.attrs,
        coords=mesh.coords,
        attr_layout=pipeline.pbr_attr_layout,
        grid_size=res,
        aabb=[[-0.5, -0.5, -0.5], [0.5, 0.5, 0.5]],
        decimation_target=decimation_target,
        texture_size=texture_size,
        remesh=True,
        remesh_band=1,
        remesh_project=0,
        use_tqdm=True,
    )
    glb_path = os.path.join(user_dir, f'sample_{timestamp}.glb')
    glb.export(glb_path, extension_webp=True)

    # --- Decimated STL from GLB ---
    stl_path = os.path.join(user_dir, f'sample_{timestamp}.stl')
    try:
        tm = trimesh.load(glb_path)
        if isinstance(tm, trimesh.Scene):
            geometries = list(tm.geometry.values())
            if geometries:
                tm = trimesh.util.concatenate(geometries)
            else:
                tm = trimesh.Trimesh()
        tm.export(stl_path)
    except Exception:
        stl_mesh = trimesh.Trimesh(
            vertices=mesh.vertices.cpu().numpy(),
            faces=mesh.faces.cpu().numpy(),
            process=False,
        )
        stl_mesh.export(stl_path)

    torch.cuda.empty_cache()
    return glb_path, glb_path, stl_path, raw_stl_path


@spaces.GPU(duration=120)
def extract_raw(
    state: dict,
    req: gr.Request,
    progress=gr.Progress(track_tqdm=True),
) -> str:
    """Extract raw mesh data as compressed .npz — much smaller than STL for transfer."""
    user_dir = os.path.join(TMP_DIR, str(req.session_hash))
    shape_slat, tex_slat, res = unpack_state(state)
    mesh = pipeline.decode_latent(shape_slat, tex_slat, res)[0]
    mesh.simplify(4000000)  # 4M faces max

    now = datetime.now()
    timestamp = now.strftime("%Y-%m-%dT%H%M%S") + f".{now.microsecond // 1000:03d}"
    os.makedirs(user_dir, exist_ok=True)

    # Save as compressed numpy — ~30-40MB vs ~200MB STL
    npz_path = os.path.join(user_dir, f'raw_{timestamp}.npz')
    verts = mesh.vertices.cpu().numpy().astype(np.float32)
    faces = mesh.faces.cpu().numpy().astype(np.int32)
    np.savez_compressed(npz_path, vertices=verts, faces=faces)

    torch.cuda.empty_cache()
    return npz_path


def update_viewer_mode(display_mode: str) -> dict:
    return gr.Model3D(display_mode=display_mode)


with gr.Blocks(delete_cache=(600, 600)) as demo:
    gr.Markdown("""
    ## Image to 3D Asset with [TRELLIS.2](https://microsoft.github.io/TRELLIS.2)
    * Upload an image (preferably with an alpha-masked foreground object) and click Generate to create a 3D asset.
    * Click Extract GLB to export and download the generated GLB file if you're satisfied with the result. Otherwise, try another time.
    """)

    with gr.Row():
        with gr.Column(scale=1, min_width=360):
            image_prompt = gr.Image(label="Image Prompt", format="png", image_mode="RGBA", type="pil", height=400)

            resolution = gr.Radio(["512", "1024", "1536"], label="Resolution", value="1024")
            seed = gr.Slider(0, MAX_SEED, label="Seed", value=0, step=1)
            randomize_seed = gr.Checkbox(label="Randomize Seed", value=True)

            # Reverted to original Microsoft range/default — fits within 120s ZeroGPU limit
            decimation_target = gr.Slider(100000, 1000000, label="Decimation Target", value=500000, step=10000)
            texture_size = gr.Slider(1024, 4096, label="Texture Size", value=2048, step=1024)

            generate_btn = gr.Button("Generate")

            with gr.Accordion(label="Advanced Settings", open=False):
                gr.Markdown("Stage 1: Sparse Structure Generation")
                with gr.Row():
                    ss_guidance_strength = gr.Slider(1.0, 10.0, label="Guidance Strength", value=7.5, step=0.1)
                    ss_guidance_rescale = gr.Slider(0.0, 1.0, label="Guidance Rescale", value=0.7, step=0.01)
                    ss_sampling_steps = gr.Slider(1, 50, label="Sampling Steps", value=12, step=1)
                    ss_rescale_t = gr.Slider(1.0, 6.0, label="Rescale T", value=5.0, step=0.1)
                gr.Markdown("Stage 2: Shape Generation")
                with gr.Row():
                    shape_slat_guidance_strength = gr.Slider(1.0, 10.0, label="Guidance Strength", value=7.5, step=0.1)
                    shape_slat_guidance_rescale = gr.Slider(0.0, 1.0, label="Guidance Rescale", value=0.5, step=0.01)
                    shape_slat_sampling_steps = gr.Slider(1, 50, label="Sampling Steps", value=12, step=1)
                    shape_slat_rescale_t = gr.Slider(1.0, 6.0, label="Rescale T", value=3.0, step=0.1)
                gr.Markdown("Stage 3: Material Generation")
                with gr.Row():
                    tex_slat_guidance_strength = gr.Slider(1.0, 10.0, label="Guidance Strength", value=1.0, step=0.1)
                    tex_slat_guidance_rescale = gr.Slider(0.0, 1.0, label="Guidance Rescale", value=0.0, step=0.01)
                    tex_slat_sampling_steps = gr.Slider(1, 50, label="Sampling Steps", value=12, step=1)
                    tex_slat_rescale_t = gr.Slider(1.0, 6.0, label="Rescale T", value=3.0, step=0.1)

        with gr.Column(scale=10):
            with gr.Walkthrough(selected=0) as walkthrough:
                with gr.Step("Preview", id=0):
                    preview_output = gr.HTML(empty_html, label="3D Asset Preview", show_label=True, container=True)
                    extract_btn = gr.Button("Extract GLB")
                with gr.Step("Extract", id=1):
                    # Viewer display mode toggle
                    with gr.Row(elem_classes="viewer-toolbar"):
                        viewer_mode = gr.Radio(
                            choices=["solid", "wireframe"],
                            value="solid",
                            label="Viewer Display",
                            info="Toggle texture / wireframe view",
                        )
                    glb_output = gr.Model3D(
                        label="Extracted GLB",
                        height=620,
                        show_label=True,
                        display_mode="solid",
                        clear_color=(0.25, 0.25, 0.25, 1.0),
                    )
                    with gr.Row():
                        download_btn = gr.DownloadButton(label="⬇️ Download GLB  (with textures)")
                        download_stl_btn = gr.DownloadButton(label="⬇️ Download STL  (no texture)")
                    extract_raw_btn = gr.Button("Extract Raw STL (No Decimation — Max Detail)")
                    download_raw_btn = gr.DownloadButton(label="⬇️ Download Raw STL")

            gr.Markdown("*We are actively working on improving the speed of GLB extraction. Currently, it may take half a minute or more and face count is limited.*")

        with gr.Column(scale=1, min_width=172):
            examples = gr.Examples(
                examples=[
                    f'assets/example_image/{image}'
                    for image in os.listdir("assets/example_image")
                ],
                inputs=[image_prompt],
                fn=preprocess_image,
                outputs=[image_prompt],
                run_on_click=True,
                examples_per_page=18,
            )

    output_buf = gr.State()

    # Handlers
    demo.load(start_session)
    demo.unload(end_session)

    image_prompt.upload(
        preprocess_image,
        inputs=[image_prompt],
        outputs=[image_prompt],
    )

    generate_btn.click(
        get_seed,
        inputs=[randomize_seed, seed],
        outputs=[seed],
    ).then(
        lambda: gr.Walkthrough(selected=0), outputs=walkthrough
    ).then(
        image_to_3d,
        inputs=[
            image_prompt, seed, resolution,
            ss_guidance_strength, ss_guidance_rescale, ss_sampling_steps, ss_rescale_t,
            shape_slat_guidance_strength, shape_slat_guidance_rescale, shape_slat_sampling_steps, shape_slat_rescale_t,
            tex_slat_guidance_strength, tex_slat_guidance_rescale, tex_slat_sampling_steps, tex_slat_rescale_t,
        ],
        outputs=[output_buf, preview_output],
    )

    extract_btn.click(
        lambda: gr.Walkthrough(selected=1), outputs=walkthrough
    ).then(
        extract_glb,
        inputs=[output_buf, decimation_target, texture_size],
        outputs=[glb_output, download_btn, download_stl_btn, download_raw_btn],
    )

    extract_raw_btn.click(
        extract_raw,
        inputs=[output_buf],
        outputs=[download_raw_btn],
    )

    viewer_mode.change(
        fn=update_viewer_mode,
        inputs=[viewer_mode],
        outputs=[glb_output],
    )


# Launch the Gradio app
if __name__ == "__main__":
    os.makedirs(TMP_DIR, exist_ok=True)

    btn_img_base64_strs = {}
    for i in range(len(MODES)):
        icon = Image.open(MODES[i]['icon'])
        MODES[i]['icon_base64'] = image_to_base64(icon)

    rmbg_client = Client("briaai/BRIA-RMBG-2.0")
    pipeline = Trellis2ImageTo3DPipeline.from_pretrained('microsoft/TRELLIS.2-4B')
    pipeline.rembg_model = None
    pipeline.low_vram = False
    pipeline.cuda()

    envmap = {
        'forest': EnvMap(torch.tensor(
            cv2.cvtColor(cv2.imread('assets/hdri/forest.exr', cv2.IMREAD_UNCHANGED), cv2.COLOR_BGR2RGB),
            dtype=torch.float32, device='cuda'
        )),
        'sunset': EnvMap(torch.tensor(
            cv2.cvtColor(cv2.imread('assets/hdri/sunset.exr', cv2.IMREAD_UNCHANGED), cv2.COLOR_BGR2RGB),
            dtype=torch.float32, device='cuda'
        )),
        'courtyard': EnvMap(torch.tensor(
            cv2.cvtColor(cv2.imread('assets/hdri/courtyard.exr', cv2.IMREAD_UNCHANGED), cv2.COLOR_BGR2RGB),
            dtype=torch.float32, device='cuda'
        )),
    }

    demo.launch(css=css, head=head)