In order to fix some rough seam problems in our displacement map (some seams where visible once the displacement map was applied) we turned on SmoothUV and regenerated the map.
This did not solve the problem so we then set the DPSubPix slider to 1. This solved the rough seaming problem BUT doing this also seems to add random noise to the displacement map (see sample).
Any Ideas what we are doing wrong here?
Mac Core 8 2.8, 14 Gb memory, Zbrush 3.12, Modo 302, PoserPro
How many polys does the high resolution model have? What is the size of the displacement map?
It’s a fairly dense base model of about 60,000+ polygons. We have divided it 3X in Zbrush and are at about 1.3 million.
The displacement map is 4K.
Mac Core 8 2.8, 14 Gb memory, Zbrush 3.12, Modo 302, PoserPro
OK, forget about the DPSubPix thing. We would be happy to get a displacement map that doesn’t show UV seaming as we did in Zbrush 2.
Attached are three samples.
We started fresh with a base mesh .OBJ file of 48,000 polygons created in Modo. We divided it 3X in Zbrush and ended up with about 700,000 polygons*.
This is what sample 1 is (700,000 polygons, no displacement map has been generated or visible).
Sample 2 shows a visible 2k displacement map generated using imported UV created with the model in Modo (UV was imported along with the model in the same .OBJ file). Results where pretty much the same with UV smoothing on (the one in the displacement map panel) and the UV boards adjusted to various sizes. All the artifact seen land on the seams of the imported UV.
Sample 3 shows a visible 2k displacement map generated using Zbrush’s GUVs (once the imported UVs were deleted). Results where pretty much the same with AUV and with UV smoothing on and the UV boards adjusted to various sizes. These artifacts appear everywhere on the model.
All the seaming artifice seen in these Zbrush samples render in our target applications (Modo and PoserPro).
*We also experimented with Smooth UV button in the Geometry sub panel prior to the division of the imported geometry without success (no real effect was seen in the displacement map generated after the division)
With the imported UV, we could pop the displacement map into PhotoShop and smooth out the seams but that adds a laborious step that slows things down and generally discourages the iterating process.
Help?
Mac Core 8 2.8, 14 Gb memory, Zbrush 3.12, Modo 302, PoserPro
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](javascript:zb_insimg(‘116789’,‘sample3.jpg’,1,0))
There is a known issue right now with seams on displacement maps created in the Mac version. It’s one of the things that’s being worked on. For the moment, my recommendation is to export the high res model and use another app to generate the displacement map.
Thanks for the update. Happy to know it’s not all me.
Is it safe to assume that this issues doesn’t extend / apply to texture maps?
Looking forward to the patch.
RTM