Limiting tessellation to 1 axis?

[CyrieN]

Hey People,

Was wondering if anyone could help me with this problem im facing, I’m trying to limit tessellation to one axis for a snow shader im making but my current setup is giving me 1 minor issue. It’s working, but at a wonky angle, and I don’t know why, any help to where I might be going wrong would be awesome.

Cheers

[IndieGameCove]

if you multiply the vertex normal by 0,0, some value; it will constrain the result to the z axis.

[CyrieN]

Works great, thanks a lot!