Moment Shadow Mapping

Reference

Moment Shadow Mapping(MSM)

Blur shadow depth buffer and get a smooth shadow. Use computer shader to do the blur process.

General shadow mapping.

Moment Shadow Mapping.

PCF.

Shwo blured shadow depth in scene.

Computer Shader result:

Before blur process.

After blur process.

Compare PCF, MSM:

PCF also can get a smooth shadow, but without a nice transition from dark to bright.
MSM will cost more time on my computer. (PCF with 120 fps, MSM with 90 fps)