Vector displacement tif to tex conversion issues

[nfowler]

Having issues after converting our tif files to tex and also tiled exr's.

the .tex image has a crunched ear fringe with lines wrapping around the model head.


While the .tif image has a smooth ear fringe and no creases or lines on the head.


Also, from Vray support they mentioned setting the correct Max and Min values on the subD attribute like so
Stats Min: -0.180688 -0.276425 -0.239472 (float)
Stats Max: 0.181396 1.016276 0.314152 (float)

Which just moved the wrapping lines on the head further in.

The tiled exr removed the lines but the ear fringe was still crunched in.

Anyone else run into this issue?

Vray 3.3
Maya 2016
Windows 7

[Svetlozar Draganov]

Would it be possible to send us the scene you are working on with the recommended setup since it works fine into our environment?

[vasil.minkov]

There is a quirk with img2tiledexr linearization - when using floating point .TIF files you should use "-linear off" to turn off the linearization:
img2tiledexr -linear off floating_point.tif
If the .tif file contains integer data the "-linear off" option should not be present.

For the tiled tiff (.tx) file you should use VRay displacement control with explicit Min/Max values and Displacement Type = vector displacement (absolute).

[nfowler]

Looks like I was changing the displacement control explicit bounds on the VRayDisplacement node, instead of on the actual geo itself, by going through the Vray attributes.
I thought this would be the workflow, either we set it up wrong or its a possible issue.

Vray support has the scene, just checking if any other users out there had run into it.

[Zdravko.Keremidchiev]

You can use either the Displacement control in the Shape node or in the Displacement node. Its just that the one in the shape node overrides the other one.