fix training light dir

main.py

@@ -70,8 +70,8 @@ if __name__ == '__main__':
 
     if opt.O:
         opt.fp16 = True
-        opt.cuda_ray = True
         opt.dir_text = True
+        opt.cuda_ray = True
     elif opt.O2:
         opt.fp16 = True
         opt.dir_text = True

nerf/renderer.py

@@ -323,7 +323,7 @@ class NeRFRenderer(nn.Module):
         # random sample light_d if not provided
         if light_d is None:
             # gaussian noise around the ray origin, so the light always face the view dir (avoid dark face)
-            light_d = - (rays_o[0] + torch.randn(3, device=device, dtype=torch.float))
+            light_d = (rays_o[0] + torch.randn(3, device=device, dtype=torch.float))
             light_d = safe_normalize(light_d)
 
         #print(f'nears = {nears.min().item()} ~ {nears.max().item()}, fars = {fars.min().item()} ~ {fars.max().item()}')
@@ -457,7 +457,7 @@ class NeRFRenderer(nn.Module):
         # random sample light_d if not provided
         if light_d is None:
             # gaussian noise around the ray origin, so the light always face the view dir (avoid dark face)
-            light_d = - (rays_o[0] + torch.randn(3, device=device, dtype=torch.float))
+            light_d = (rays_o[0] + torch.randn(3, device=device, dtype=torch.float))
             light_d = safe_normalize(light_d)
 
         results = {}