hello again,
I just tried this all over again, creating a fresh new project in 4.5.1
I made the same setup with the same material with the displacement coming out of the Diffuse’s Alpha, same mesh with LOD painted as foliage, same parameters in the material instance with -0.5 displacement bias, etc. everything is the same.
in this 4.5.1 project, the issue is not there.
this confirms several things:
- that the issue is the same as this one from Red Gnash,
- that the issue is really a bug
- that the issue was introduced either in 4.6 or in 4.7, but in 4.5 it worked flawlessly. (Red Gnash updated directly from 4.5 to 4.7 so it’s unknown if the issue is there in 4.6 or not)
so,
I’ve clearly showed several times that the problem occurs only with tessellation + foliage + LOD, but not when all 3 features aren’t there.
It’s also clear that the issue only occurs when the tessellated material is completely hidden due to LOD, and the issue isn’t there when the tessellated material is actually in the view.
you have repro steps on a project that clearly and concisely shows the issue, and now you have the number of the UE4 version where the issue was not there, and a version where the issue is there.
I can also provide the 4.5 project if needed.
please spend some time to investigate this issue, it’s a real thing.
cheers,