MATTE/SHALLOW-Does VRay support this material?

[sexyvray]

Hi,In my scene, I have put a omit light and turn off it,and put a hdri in
enviroment maps,and turn on VRay Indirect light and second light and skylight,I have put my object in it,and put a plane under it,and assign it the matte/shallow material,But I can't get the shallow,It seems dispear,No
shallow,Does VRay spport Matte/Shallow map?Or Is there any wrong with me?Thanks

[RErender]

Matte objects are handled directly by V-Ray there are two methods you can use:

1. In the "system" roll-out of the render dialogue click "object settings" , select the name of the object and you will see settings very similar to the Matte/Shadow map.

2. Use a VrayMTLWrapper arround a VrayMtl , there you will find the same settings.

[v_wrangler]

Matte objects are handled directly by V-Ray there are two methods you can use:

1. In the "system" roll-out of the render dialogue click "object settings" , select the name of the object and you will see settings very similar to the Matte/Shadow map.

2. Use a VrayMTLWrapper arround a VrayMtl , there you will find the same settings.

I Don't remeber this being documented in the manuals - make sure you
set the Alpha Contribution to -1, otherwise you will have opaque alpha
for the matte...

[egz]

the documentation for the VRay matte is hidden way down in the What's new HTML file for 1.08.04p:

NOTE on matte/shadow support:

While MAX's Matte/Shadow material is still not fully supported, VRay offers another way of controling objects' matte properties. There are several new parameters in the Object properties dialog, described below. This is useful, because in this way the object still has a normal material, which is necessary when the object is visible in reflections, refractions and for GI calculations. Note that the matte/shadow support is still a new feature to VRay and bugs are possible.

Matte object - checking this will turn the object into a matte object, which means that the background will show through the object. This concerns only the way the object looks to the camera; the object's material will be used for reflections, refractions and GI.
Alpha contribution - this allows you to control the way an object influences the alpha channel of the final image. Note that this parameter is valid for all objects, not only for matte objects. A value of 1.0 means normal alpha - opaque objects will set the alpha to white, and transparent objects - in shades of gray with black meaning a fully transparent object; a value of 0.0 means that the object will leave no trace at all in the alpha channel - as though it is not present in the scene (it will generate RGB output though). Finally, a value of -1.0 means the object will "cut" its alpha from the final image - this is typically the behaviour of matte objects.
Shadows - when checked, the matte object will be darkened by shadows from direct lights
Affect alpha - when checked, the shadows will also affect the alpha output of the matte object, and regions in shadow will produce white alpha, while lit regions will produce black alpha.
Color - allows the user to choose a color for the shadows.
Brightness - controls the brightness of the shadows.
Reflection amount - controls how much of the reflections on an object will be added to the matte; currently this works only if the object has a VRayMtl on it.
Refraction amount - controls how much of the refractions of an object will be added to the matte; currently works only with VRayMtl.
GI amount - controls how much the indirect illumination will influence the matte object; works with all materials; currently this information is collected with direct computation of the GI and will not use the irradiance map, since the map does not store all the required information; this will be corrected in a future release.