Update app.py

app.py

@@ -556,6 +556,7 @@ def draw_mask(l, t, v, d, evt: gr.EventData):
     mask = mask[1:mask.shape[0]-1, 1:mask.shape[1]-1]
     
     d["layers"][0][mask>0] = (255,255,255,255)
+    d["layers"][0][mask==0] = (0,0,0,0)
     #d["background"][mask>0] = (255,255,255,255)
     
     return gr.ImageEditor(value=d)
@@ -639,6 +640,7 @@ async(c, o, b, p, d, n, m)=>{
             let mesh = q[i];
             mesh.dispose(false, true);
           }
+          BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1].alphaIndex = o_.length-j;
           BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1].scaling.z = -1;
           BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1].applyDisplacementMap(m[o_[j]].url, 0, 255, function(m){try{alert(BABYLON.Engine.Version);}catch(e){alert(e);}}, null, null, true, function(e){alert(e);});
           BABYLON.Engine.LastCreatedScene.meshes[BABYLON.Engine.LastCreatedScene.meshes.length-1].material.diffuseTexture.hasAlpha = true;