tone down post exposure

src/routes/viewers/BabylonViewer.ts

@@ -27,7 +27,7 @@ export class BabylonViewer implements IViewer {
 
         this.scene = new BABYLON.Scene(this.engine);
         this.scene.clearColor = BABYLON.Color4.FromHexString("#000000FF");
-        this.scene.imageProcessingConfiguration.exposure = 3;
+        this.scene.imageProcessingConfiguration.exposure = 1.3;
 
         this.camera = new BABYLON.ArcRotateCamera(
             "camera",