Issue about render feature

[Doctor-James]

Hello, thank you for your excellent work. I have encountered some issues while porting your diff-gaussian-rasterization to my project：

RuntimeError: Function _RasterizeGaussiansBackward returned an invalid gradient at index 4 - got [4224, 256, 256] but expected shape compatible with [4224, 256]

rendered_image, rendered_feature, radii, depth = rasterizer( means3d, # 4224, 3 means2d, # 4224, 3 opacity, # 4224, 1 colors_precomp=colors, # 4224, 3 semantic_feature = feature, # 4224, 256 scales=scales, # 4224, 3 rotations=rotations) # 4224, 4

It seems that the forward propagation is working fine, but there is an issue during the gradient backpropagation. Since I am not familiar with CUDA code, I would like to ask if you have any suggestions or debugging methods.

[yzslab]

Before getting a answer from the author. I think replace with gsplat can be a temporary solution. Here is a patch can be apply to this repo. directly: https://github.com/ShijieZhou-UCLA/feature-3dgs/issues/14#issuecomment-2185639700

[Doctor-James]

Thanks，it works