浮点数精度误差导致的面片闪烁
https://zhuanlan.zhihu.com/p/165062873
https://zhuanlan.zhihu.com/p/133957594
TAA resampling blur

Catmull-Rom texture sampling
https://www.shadertoy.com/view/MtVGWz
Catmull Rom on the left, bilinear on the right.
Parallel Recursive Filtering of Infinite Input Extensions
https://github.com/andmax/gpufilter
load or gather

gather可以一次性读取四个值,但是可能会考虑一些兼容性问题。