Render Out Objects and shadow only

[sanj]

Hi,

I have a simple scene that consists VrayPlane, a 3d object and several lights, s it possible to render out just the 3d object and shadow?

I need to import the image into PowerPoint whose background may change.

Thanks

Sanj

[percydaman]

yes, go to your ground plane and go to its vray properties. Then choose matte object, with shadows.

[sanj]

Percey thanks for reply, I can get the 3D object but not shadows, I must be doing something wrong.

I have attached an example.

http://www.yousendit.com/download/dV...Z2dEa1ZMWEE9PQ

Any help is apprecicated!

[percydaman]

you need to set the alpha contribution to -1, in the matte properties.

[peakyfreak80]

You can also set your VrayOverrideMaterial to a VrayMtlWrapper with "Matte surface" "Shadows" and "Affect alpha" checked. Along with the alpha contribution at -1.0.
Then just use the OverrideExclude and select your people.

Its nice when you don't want to go through objects and adjust their individual material properties.


peakyfreak

[sanj]

Hmm, I've tried this but still cannot get this working as I need, just to clarify...

I have the VRay plane that a 3d box sits on, the box casts a shadow on the VRay plane, if I set the VRay Plane to Alpha Matte and alpha contribution to -1, when I save as a PNG file only the box is shown no shadows - am I doing something wrong?

Thanks!

[sanj]

Here's the image but as you can see no shadow - I've tried all setting as per the previous posts.

Any ideas?