I kept rendering pure black images, and even the original rgb and depth renderings turned black.

[chenkangjie1123]

Great job! I added the normal picture rendering function to the diff cuda code of FSGS according to the normal rendering part of your diff-raster cuda code, but I tried several times and failed. I kept rendering pure black images, and even the original rgb and depth renderings turned black. I tried to print normal tensor and found that it was not 0 only when initialized, and then it was always 0. What do you think is wrong with this?

[slothfulxtx]

It's hard to say which kind of error may cause the zero value of normal tensor, the most possible case is that you prune most of 3D gaussians during optimization