I’ve generated some maps from a scan in zbrush, and the negative values weren’t working on 32 bit. Adding negative colors, tweaking all the displacement shift/alpha shift in the file loader didn’t help.
After a while I decided to use 16 bit maps, and voila now I have another problem- on the uv seam there’s tearing. The displacement doesn’t have sharp transition, there’s enable continuity enabled, the texturing filter is both off on the file loader and in the shape node with vray displacement control. The texture is defined as raw and using two zbrush format udims. Am I missing something?
32 bit displacement should work out of the box. Did you set the displacement bounds to manual and specify the positive / negative value? For the seam, see if turning off filtering in file node helps.
I even unchecked subdivide uv’s as the maps were generated without subdividing uv’s and I know there was some subtle difference between zbrush’es subdivision and maya’s.
can you post this scene with the displ tiles for us to check?
Can you try if enabling ‘keep continuity’ helps in any way? Also - what V-Ray version is this?
Whoops sorry didn’t reply for such a long time, didn’t see any notifications. this is vray 3.6 and keep continuity wasn’t making any difference. If I remember correctly did blur a line on the 16bit texture between those udims in mudbox and it helped a bit, but still there were some artifacts. I’ll take another look at it later once I can and post it here. Thanks everyone 
Hi
Would you use PTEX?
MAYA also uses the same.
Or UV SEAM is not visible on the camera.
I’ll have to use that asset soon enough, I’ll check that, and all the previous suggestions, thank you very much!