Shadow Recieving Matte for Ground Plane

[soulburn3d]

Probably a super simple question. Say I have a plane and a teapot and a vraylight dome with an HDRI. I want the plane to catch the shadow from the teapot. I apply a VrayMtlWrapper material to the plane, set Matte Surface to on, shadows on, affect alpha on, alpha contribution to -1. Render, no shadow. What step am I missing? Thanks.

- Neil

[mcnamex]

dome light set to use irradiance map...?? or brute force

[soulburn3d]

Neither, GI is not enabled.

- Neil

[R2J2]

It won't receive shadows if the teapot is set to matte also, and just to be obvious the tea pot is casting shadows?

[soulburn3d]

The teapot has a standard material. And yes, the teapot is casting shadows, if I put a standard material on the plane it receives shadows like it should, it just doesn't see through to the vraylight behind it.

- Neil

[soulburn3d]

Here's a test file that fails, if anyone's interested in taking a poke at it.

- Neil

[tryharder]

... simple answer.
... replace the standard materials with vray materials !!! especially in the overwrite material
... first use a vray plane light to see the effect ... the shadow
... use a map in the background ... to see the matte effect

hope that helps

love your scripts

Klaus

[soulburn3d]

replace the standard materials with vray materials !!! especially in the overwrite material

Now I'm confused. Is there supposed to be a submaterial in the VrayMtlWrapper? If so, what material? And are you saying there has to be an environment map? There's no way to see through the plane to the map that's visible in the VRayLight?

love your scripts

Thanks!

- Neil

[tryharder]

no time for confusion
i will post a file in a minute

Klaus

matte_2014_Vray_3.zip

[Dariusz Makowski (Dadal)]

Do not never use standard materials with Vray. use Vray materials for vray work.

[joconnell]

Now I'm confused. Is there supposed to be a submaterial in the VrayMtlWrapper? If so, what material? And are you saying there has to be an environment map? There's no way to see through the plane to the map that's visible in the VRayLight?

- Neil

Vray will never output render elements for standard materials so any vray type features, you'll have to make sure you're using vray materials exclusively. I'd say what Klaus is saying is that you've gotta have a vray material as the actual base shader in the vrayMTLwrapper.

[tryharder]

never ever

the demo file

[soulburn3d]

no time for confusion
i will post a file in a minute

Klaus

[ATTACH]19051[/ATTACH]

Thanks. So your file works, but you changed a lot of stuff. I'll poke at this tonight when I get back from work to see if I can narrow down the exact setting that's different between the two files that stops my example file from doing the right thing. Thanks for the help so far!

- Neil

[soulburn3d]

Do not never use standard materials with Vray. use Vray materials for vray work.

That was just an oversight. Replacing the Standard material with a vraymtl in my original file equally doesn't work.

- Neil

[tryharder]

... put a vraymtl in the vraymtlwrapper as base material
... make yor dome light invisible ... to see the background
... put a map in the background

and

your file works