Because vray displacement is carried out at render time it seems impossible to apply a gradient ramp to it as a mix map mixer channel to mix between 2 different textures at different heights. Is this not possible ? Applying a UVW map doesn’t seem to work either.
Somwhat related. Ive been playing with vraydisplacement within a falloff map to minimise the calculation at distance and noticed that it only worked with 3d displacement. 2d would ignore the falloff. Is this correct or a bug?
2D displacement need mapping coordinates to work. For maps designed to work in object or world space (Falloff for an example) you have to use the 3D mode.
The only way I’ve managed to do this so far is to just treat the plane as a 2d map so I have to use a radial gradient or circular texture to act as an alpha. If I try to use a UVW map for the channel I think it just assumes it is a plane and cannot calculate the UVW mapping at render time. I’ll check out the above posts as I’ve not had a chance to try them yet. Cheers