Problem with Reflection Glossiness set to 1.0

[fexmedia]

Hi,

I'm having a problem on one machine at work. When I create a VRayMaterial and just increase the reflection color but leave Reflection Glossiness at 1.0 the Material isn't reflective at all. If I set the Glossiness value to 0.9999 it behaves like a mirror as expected. Can someone tell me how to solve this problem?

I wrote some own VRayShaders and Textures, maybe it has something to do with that? It appeared with normal VRay-Version and still appears after switching to nightly builds. so maybe one of the brdf.dlls is going nuts? If i remember right I just compiled some sampleBDRFs for testing...

In the image you can see the problem, the right sphere has the exactly same shader, but reflection glossiness is set to 0.999 and appears reflective.



Vray Plug-In Version is 2.25.01 (23406)
Windows 7 64bit,
Maya 2013


thanks,
Fex

[tashko.zashev]

Hi,

It's a very odd issue. Do you get the same behavior with V-ray Car paint material for an example?

[ivaylo.ivanov]

Do you get some sort of message that BRDFMirror can't be created? Before 0.999, another brdf is used, and it seems vray_BRDFMirror.dll is missing, or can't be loaded for some reason. VRay for Maya is trying to report such problems in the output log.

[fexmedia]

Hi, thanks for the hints,

unfortunately I'm not at work today so I can't test if its the same problem with the carpaint shader. But if I get it right I just need to copy the "vray_BRDFMirror.dll" from the path "C:\Program Files\Autodesk\Maya2013\vray\vrayplugins" of a workstation that doesn't have that problem to my machine? I'm pretty sure that I compiled the Mirror BRDF example from "C:\Program Files\Chaos Group\V-Ray\Maya 2013 for x64\samples\vray_plugins\brdfs\vray_brdfmirror", so is there maybe something wrong in the source code of that example? Or maybe I wrote some crap =)

Will try that tomorrow, thank you very much for the replys!

[fexmedia]

Hey,

I just copied the vray_BRDFMirror.dll from a machine that didn't have the problem, but that dosn't solve it. Any further ideas? Even deinstallation didn't help. CarPaint has the same problem with the Flake Glossiness, while Base and Coat Glossiness seem to work right....strange.
And I Can't find any error messages about the vray_BRDFMirror, not in scripteditor and not in otput window of maya. Do you mean another one?
when rendering with glossines 1.0 the material doesn't cast Reflection rays:
[2013/Aug/29|13:46:08] V-Ray: Reflection rays: 0

when glossiness 0.99:
[2013/Aug/29|13:53:46] V-Ray: Reflection rays: 955881

It's quite important, because this machine is used at night as part of the renderfarm. Some more ideas?

Thanks in advance

[ivaylo.ivanov]

After the deinstallation, did you remove the whole vray folder? I'm not sure if plugins with duplicated IDs can cause such issues, but deleting the whole folder manually is always a good idea. Check also if you have other paths from which plugins are loaded.

[fexmedia]

Thank you very much, deinstalling and deleting that folder completely solved the problem. Maybe I should check all my Plugin-IDs before adding them again to the vrayplugins-folder. Is there a List of IDs that can be securly used? I remember something like 000000 to 8FFFFF could be used, is that possible?

Thanks,
Fex