I am trying to create a basic shadow catcher material. First Scene: When I use a Dome Light with an HDRI it works great with vrayproprieties into a “shadow catcher” plane as you can see in the first image. The second image is just the gi contribution of the matte that gives a “strange result”. B…

Same problem I’m having as here: http://www.chaosgroup.com/forums/vbulletin/showthread.php?67342-imagePlane-affected-by-environment-override/page2 Can’t quite work it out either.

Tnks Rob. Well. Vlado said in that thread to use the environment overide with the screen mappint but it gives the same result as with the imageplane. At least in my scene. Maybe this illustrated examples from my scene will help Vlado and guys solve this.

When you are using a dome light in conjunction with GI and matte objects, make sure that you override the GI environment with a black color. Otherwise, the matte shader will think the scene is normally lit with the GI color, when in fact it is not. Best regards, Vlado

The dome light exemple is working for me. :slight_smile: My main issue is with the second scenerio when there is no lights, only GI coming from the geometry mapped with an hdri. Is there a solution for it Vlado?

Yes, I am using a vraylightMtl, I had try with a surface shader but it’s the same. I know the environment thing is somehow the issue. I think the problem is that the matte surface works with lights casting shadows, and not with geometry illuminating with an hdri. It just that I really need this cas…

btw, I did try to convert the geometry to a “lightmesh” and mapped this with the HDRI. It works, but the resulting illumination is not what I was looking for. Far away from the domelight result and the mapped geometry. The shading network.

[image] Getting paid make sure that you override the GI environment with a black color. Sorry to sound stupid but I want to ensure I understand correctly. Do you mean in the ‘Environment’ section of the Render Settings window, or do you mean in the material override for the matte ground ? I’v…

I’m not sure it will work like that; the matte/shadow functionality is based on shadows from actual light sources and the GI environment. It won’t work with mapped geometry (unless it’s a mesh light, but then there would be other issues). There are of course ways to get what you need, but they requ…

Live Action and CG integration

V-Ray for Maya V-Ray for Maya :: Issues

vlado May 10, 2012, 7:33pm 6

Is it just mapped through a VRayLightMtl material?

Best regards,
Vlado

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