Hello everyone I am doing some work on vray, I have gone thru the tutorials with the compositing, and understand very well how it works, im just wondering if someone can give me some information what type of modifiers do I do to the composite images in photoshop, for example zdepth do i give it a multply or screen? and for my ambient occulsion, shawdows, reflection, refraction? and in what order do i stack them in photoshop?

I Apperciate it alot if someone can help me out with this issue, Thank you very much Juan.

can someone please give some help here? Just trying to get some still images look good, i have rendered out rawGI, rawlighting, reflection, refraction, specular, shadows, zdepth, and ambient occulsion. how do i stack these in photoshop, and what kind of modifers do i add to each one in photoshop, or whatever program you recommend?

Hi Juan,

I’m not sure it can be done in Photoshop as you really need to be using a program that can handle floating point images like .exr or .rpf. It can be done in Combustion with .rpf files though and you can download a demo copy to try it.

As far as comping with the elements you have saved goes let’s take them one at a time:
RawGI MULTIPLY with Diffuse
RawLight MULTIPLY with Diffuse
(RawGI * Diffuse) add to (RawLight * Diffuse) This gives you a basic render with materials and lighting.
On top of this you ADD your Specular, ADD your Reflection and ADD Refraction. And also ADD SelfIllumination if you have it.
You shouldn’t need the shadow pass as this information is in the lighting and GI.
Z-Depth isn’t an element you composite directly with, you use it to create post effects like depth of field or fog etc.
Ambient occlusion is a bit different from the others, it is used to add detail to the lighting if the GI solution is poor. I would MULTIPLY the AO with the result from above if needed. If that looks too severe then lighten it first.

All your passes should be saved un-gamma corrected ie. gamma 1.0 then gamma correct the result if required.

I’ve added a schematic from Combustion which might make things a bit clearer.

Hope some of this helps,

Dan

	Attachment