UVW Mapping ignored when displacement is in effect

[Dynedain]

Using the vray material displacement slot is having serious problems.

Viewport:



Scanline(no disp):



Vray with material displacement slot CHECKED, and global displacement ON:


Vray with material displacement slot UNCHECKED and global displacement
ON:



Vray with material displacement slot CHECKED or UNCHECKED and global displacement OFF:





Note: I stumbled accross this while I was trying to use multiple UVW map mods to controll the mapping of a multi-sub material. If displacement is on (as I want it to be) then the UVW mapping is being ignored for the map in the displacement slot.

[vlado]

I'm not sure it is a bug; I think the problem is that you have too big polygons for the 3d displacement to handle effectively. Try to dice the geometry a little bit and see if it helps. If you wish, you can also send me the scene to look at to vlado@chaosgroup.com

Best regards,
Vlado

[Dynedain]

I've tried really subdividing the surface, but its not solving the problem:


I'll try stripping down the scene to send to you

[rhino]

Are you using box mapping? I always use box mapping even on a flat plane in 99.9% of cases it avoids those face errors.

[Dynedain]

I've been using planar mapping, but box mapping has the same result.

[percydaman]

tried putting a meshsmooth modifier set to 0 before your displacement modifier in the stack?

[Dynedain]

tried putting a meshsmooth modifier set to 0 before your displacement modifier in the stack?

Not using a displacement modifier. I'm using the vray mat displacement channel because of multi-sub mats.

[Dynedain]

I'm not sure it is a bug; I think the problem is that you have too big polygons for the 3d displacement to handle effectively. Try to dice the geometry a little bit and see if it helps. If you wish, you can also send me the scene to look at to vlado@chaosgroup.com

Best regards,
Vlado

Scene file sent

[vlado]

It seems that the problem is in the noisy concrete displacement map; it has so much tiny detail, that the displacement cannot represent it properly without very high settings. It would be best if you use it just as a bump map for this material (Seeded Aggregate Concrete).

Best regards,
Vlado

[Dynedain]

Thanks for the info vlado!