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Richard7666
07-07-2011, 03:16 AM
I...have done it before but now it refuses to work since upgrading to Maya 2012. Just checked in Maya 2010 (still installed) and it works fine. All I get in 2012 is the option to save to PNG in the save file dialogue box.

I have EXR selected under Vray Common, same setting as I use in Maya 2010.

Vray 1.5 SP1.

Rendering from the render menu still works fine.

ALSO anyone want to help me with compositing a (multichannel) EXR? I am trying to do what this tutorial says, (http://sovibrant.co.uk/threads/view/28/sovibrant-university/photoshop/exr-layer-setup) but the reflection and refraction layers black everything out.
I have attached my exr here http://www.megaupload.com/?d=W11OS818

If someone with Nuke or ProEXR or something could check to see I'm at least OUTPUTTING it properly that'd be grand :)

tharrell
07-21-2011, 03:55 PM
nder menu still works fine.

ALSO anyone want to help me with compositing a (multichannel) EXR? I am trying to do what this tutorial says, (http://sovibrant.co.uk/threads/view/28/sovibrant-university/photoshop/exr-layer-setup) but the reflection and refraction layers black everything out.
I have attached my exr here http://www.megaupload.com/?d=W11OS818

If someone with Nuke or ProEXR or something could check to see I'm at least OUTPUTTING it properly that'd be grand :)

Unsure about your format output issues... I'd suggest installing one of the new nightlies to see if it was just a UI glitch in render globals (happens).

In terms of compositing, VRay is completely additive when you're dealing with the basic passes, so...

Lighting + GI + Reflection + Refraction + Self Illumination + SSS

In Nuke, you'd plus them all together. Merge each pass and change the mode to plus. In photoshop, you'd use linear add as a layering mode assuming you're working with EXR.

If you need more control, you can re-create some of the passes by using a raw pass multiplied by something.

Rawlighting * diffuse = lighting
Rawgi * diffuse = gi
Rawreflection * reflectionfilter = reflection
Rawrefraction * refractionfilter = refraction

Note that if you use additive mode in VRay blend materials, your beauty renders might not always equal your assembled passes. They'll be close, but not identical.

Hope this helps,

--T

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