Convert RGB image to texture in a differentiable way?

[XingangPan]

Hi, thanks for your amazing work. I my project, I want to convert RGB images to textures. As the RGB images are generated by a CNN that I want to optimize, I need this process to be differentiable. However, in the current code, the 'load_textures_cuda' function does the conversion but is not differentiable. I am wondering if there is any convenient way to do this? Thanks.