I created a new project from scratch and imported the download files just in case I had any duplicate names. I loaded the included scene called “Snow_Basic”, and the rocks are set up to use the shader called “ShaderSchool/Examples/Snow_Basic”.
I have an ASUS ROG gaming laptop with an NVIDIA GeForce 980M graphics card, if that’s useful information. I just updated the graphics card driver, and the problem persists both before and after the driver update. I am using Unity version “2017.1.2f1 Edu”.
I tried using the “Snow_Fade” scene, and this one fades like it’s supposed to. Still not sure how my project doesn’t calculate the gradual snowiness though.