How can we change vray proxy materials?

[arnau]

Hello,

I have done a forest with different proxies trees.
To create the trees I followed the instructions from this link below:

http://help.chaosgroup.com/vray/help/sketchup/150PB/tutorials_2d_proxies.htm

Now I would like to change some settings from the trees textures to effect on the Alpha channel.

How could I change vray proxy textures once the proxy is done?

(I want to use the alpha channel for post production in some program like Photoshop)

Thank's in advance!

[dkendig]

there should be a multi material for each proxy. There should be sub materials for each multi material, which are displayed when you select the multi material. You can edit each of these materials, by selecting each one in the list to the left, or you can change which material is applied to each material ID for the multi material.