V-ray 3.4.004 issues

[Mousa_SA]

Hi,

I found these issues:
1-I have made some tests with Laubwerk plugin and I noticed that a lot of bright pixels in the VFB, I have fixed the issue by turning on the "Subpixel clamp". Maybe turning it on by default could be better.
2- When I go to a scene that has some hidden objects while V-ray interactive is on , V-ray interactive will not hide them, and vice versa.
3-Currently V-ray create random colors for the "V-Ray Texture Helper" images. Maybe it would be better if it could color them based on the diffuse color when it's available, and when there are many diffuse layers it could take the layer which is on the top.

[Peter.Chaushev]

Hello, Mousa,
Thank you for your post!

1. Do you mean "fireflies"? These usually depend on the scene setup and are not a universal issue. The "Subpixel Clamp" option as well as everything else in the Optimizations section is meant as solutions for specific scene problems. In most projects users don't need to use that section at all.
2. I'll investigate this, thank you for bringing it up!
3. The V-Ray placeholder texture is used to illustrate in the viewport all procedural V-Ray textures. You suggestion could work only for some of those procedurals. For now, it would be better to have same behavior for all textures, and not introduce partial changes. I'll relay the idea to our Dev team, nevertheless.

Kind regards,
Peter

[Mousa_SA]

Hi Peter,

Great, thanks !. Yes I meant the Fireflies. I just made the same test again but the "Subpixel Clamp" didn't remove the bright pixels !, I will try to contact Laubwerk author maybe he could made some changes for the materials setting.

By the way this is the tree which I have tested from the free Kit:

[Peter.Chaushev]

Could you please turn the Sunlight invisible and see if it makes any difference?

[Mousa_SA]

Hi,
I just made some tests again, it seem that the Fersnel value for the Leaves material is too high. when I reduced it to 1.2 the result become much better, but also I have to decrease the "Affect Specular" slider for the sun to 0.2 to make the result look normal.

It took me long time to find the leaf material for this tree, beacuse the laubwerk tree create almost 42 material for each tree type. I saw in V-ray 3.5 for 3dmax that you have implemented "Select object" and "Select object materials" in VFB, it would be helpful if that could come to V-ray SketchUp with a possibility to select the sub proxy material in VFB.

Here is the Laubweek tree file

[Peter.Chaushev]

You are right, this clears the undesired fireflies.
Regarding the ability to select objects and materials through the VFB, planning its implementation has not begun yet, but this has been discussed, and would be a great feature to have in V-Ray for SketchUp and Rhino.

Kind regards,
Peter

[Mousa_SA]

Great news !, thanks

[Mousa_SA]

Hi,

-When I add a a fully transparent diffuse layer above VrayBDRF layer that have a refraction color more that 0,0,0 (Value between 1-50), the back face color for this material will be turned to black, that seems a bug.

-I have tried to change the Multisub material preview in SketchUp (V-ray 2 material) to "V-Ray Multi Material.png" by changing one of a sub material to something else and switching back it, but if I Change one of these material to "None", then all the sub material will be turned to "None" or will use one of these materials for all sub materials.

[Peter.Chaushev]

When I add a a fully transparent diffuse layer above VrayBDRF layer that have a refraction color more that 0,0,0 (Value between 1-50), the back face color for this material will be turned to black, that seems a bug.

We'll look into it. Thanks!

I have tried to change the Multisub material preview in SketchUp (V-ray 2 material) to "V-Ray Multi Material.png" by changing one of a sub material to something else and switching back it, but if I Change one of these material to "None", then all the sub material will be turned to "None" or will use one of these materials for all sub materials.

Do you mean the Multi Material preview? It simply takes on the preview of the first sub-material in the list. Clearing all sub-material slots if you change the first one is not intended behavior. It will be corrected.

[Mousa_SA]

Hi Peter,

Yes it is the Multi Material, but in the SketchUp material editor, this one :

In V-ray 2 the Multi Material skp preview is taken from first sub-material, in V-ray 3 when I update the preview to the image above that will remove unnecessary large texture from skp file, thanks for taking these bug in your consideration.

[Peter.Chaushev]

Hello, Mousa,

The MultiMtl placeholder texture displayed in the SketchUp viewport is not a subject to change. It has been chosen as the most suitable representation out of the options we've had.
Ideally, the MultiMtl should display previews for each sub-mtl based on proxy's Face IDs. This, however, is currently not possible.

Kind regards,
Peter

[Mousa_SA]

Hi Peter,

Thanks for clarifying that.

In this file if I render the "Aerial View 1" Scene at big resolution (4k for example), and save the image to history after that make a regions render, the regions will be shifted like the image below, note that as much regions is created the shift will be much Obvious , you could try to make 5 regions in different places to reproduce the issue.

[Peter.Chaushev]

I just double-checked your scene and another quickly-made one using both the official version as well as our latest internal build and was not able to reproduce the issue.
Could you please confirm you have not involuntarily moved the camera view slightly?

Kind regards,
Peter

[Mousa_SA]

Hi,

Yes I confirm that, I didn't move the camera.

I have made many attempts in order to reproduce the issue, this video is showing exactly what I have did after opening the file :
http://www.screencast.com/t/mAlV1wvOUC

[Mousa_SA]

Hi,

-The shift in the previous file is mush obvious when I enable "Lock camera orientation" while I'm on one of the scenes and click on the other scenes and switch back to the first one, check this video.

-This multi material is not loaded into this skp file, seem that an identical materials names are causing that issue.