POM Decals

Development Rendering
1

Hey guys,

I’m a wee bit puzzled with creating POM decals in UE4, I’m transferring my workflow over from Cryengine where I use tileable textures and POM decals for the details etc.
I’ve got my basic master shader setup for my material instances, have all the correct maps baked out, diff,height,normal etc. and POM is actually working fine, no problems what so ever there.
But when I try and enable the opacity it is refusing to work. My question is can UE4 actually handle POM in decal/translucent form?

My knowledge of the node based shader system is poor and I don’t really know what I’m doing properly haha.

Any help at all would be a real help.

Thanks.

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What does it look like? My first guess is that the bumpoffset node is doing some kind of tangent transform that is invalid for decals. If that is so you could just roll your own bumpoffset and supply manual vectors.

Just a caveat, but bumpoffset is very different from POM. POM means parallax occlusion mapping which means ray tracing and shadow tracing.

Bumpoffset has no parallax correction since it assumes all pixels will be in the same Z plane, and will have artifacts on steep slopes.