Matte Properties

[k-arts]

i guess the problem occurs with both of those techniques. Using the vray properties to get a shadowplane is an often used feature here and as iam sure everywhere else as well. Now my questiion is when i have a lot of single objects i rendered out with their shadowplane and stack those now in photoshop together the white background-layer keeps getting greyer since the alpha isnt 100% black. But how can you make sure that the aplha becomes 100% black. Do u do it in ps or in compositing? Having 10 layers stacked makes it really visible. Anyone has a solution?

cheers

Ralf