About 2D filter

[Zhentao-Liu]

I wanna ask why the 2D filter could work. In original 3DGS, it uses 0.3f, and you use 0.1f with a coef.

why does it work?

[niujinshuchong]

Hi, besides kernel size, we also consider the normalization factor (coef in your screenshot). The kernel size should be choose to match a single pixel area and using 0.1 is a better approximation.