Wonky tesselation results

JoshWilkinson

I'm working on a dirt road right now but I'm getting some terrible results with the tessellation. I have spikes that grow and shrink with camera positioning, making the whole thing look like water when in motion. I assumed this was caused from noise in the displacement map but I don't think my map is too noisy, is it?

JamesWild

Looks to me like you're running the RGB output of the heightmap directly into the offset as it looks like an equal offset on all three axes. Take one of the channels, multiply it by world normal, use that.

Also; do not use tesselation heightmaps for strong changes in height, it's better at refining shapes.

LoTekK

I have spikes that grow and shrink with camera positioning

In addition to what James said above, what sort of scale is this at? The tesselation is dynamic by camera distance (or some similar parameter), so it's possible that's what you're seeing (especially with the tesselation scale being so great, any change in tesselation will affect the displacement).