Parallax Median...

IchII3D

I have setup a Parrallax Occlusion Mapping master material using the UDK documentation as reference.

http://udn.epicgames.com/Three/DevelopmentKitGemsParallaxOccludedMapping.html#Parallax Occlusion mapping

The problem is the median value it uses is 1 (255,255,255) meaning everything in the map is depth. This is problematic when working with props or split edges. I create my displacement maps using a median of 128,128,128 and a height bias of 0.5 allowing me to specify elevation and depth and removing the parrallax effect in problematic areas. The problem is I can't for the life of me figure out how to do this in UDK.

I need to some how edit the TexCoord to counter each level of depth that gets added. Essentially retaining the Parallax effect but subtracting my height value. I tried inputting subtracts, adds, divides, multiplication but can't figure out the math I need to use and where to put it to resolve this issue.

Butthair

Maybe I'm not sure what you mean, but I do believe the material editor has a node called BumpOffset. That will give parallax using a height map.

repete

BumpOffset works really well:

watch from 12:00 onward !

http://www.youtube.com/watch?v=vF5PCFT-yOY

passerby

considering how problematic the shader is to you, and how expensive it is, maybe just use more geo, and normal maps, or use tessellation, since that is what this is really trying ti emulate in the first place.