Photoshop :: Openexr Renderpasses From Maya Are Black
May 4, 2012
You can render passes in Maya that split up a beauty image into layers like reflection, diffuse, specular etc.
One option is to save these passes in float openexr files(for ultimate color fidelity).
The beauty exr file reads just fine in photoshop.
The render passes however show up as black in photoshop even though they are not as verified by imf_disp, a viewer program that comes with Maya.
I know the problem is that the header in the renderpass openexr file is the name of the "renderpass"(eg "specular") as opposed
to RGBA.
The solution for me has been to use a program that comes with Maya called imf_copy to replace the headers of the renderpass files.
in windows I use the following command line:
"C:Program FilesAutodeskMaya2012inimf_copy.exe" specular.1.exr specular_forphotoshop.1.exr
This results in the new file specular_forphotoshop.1.exr which is no longer black when opened with photoshop.
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Sep 27, 2011
I have recently discovered what I think could possibly be a bug when using the OpenEXR format with Mental Ray passes and color management in Maya 2011 & 2012.
For example If I create a scene using the below steps:
1. Enable Color Management (default linear work-flow)
1. Create a sphere and assign a Maya material or a mia_material_x_passes shader to it (textured)
2. Add the sphere and light to the masterLayer or any custom layer.
4. Create a beauty pass, and associate with layer
3. Change the output image format to OpenEXR
4. Render and the color looks correct once a gamma correction of 2.2 is applied. See image attached goodColorSpace.jpg
However, If I add a (CGpost) pass to the same layer; for example a cameraDepth or Object Normal. The color space for the beauty and even the masterlayer passes are all washed out. See image attached badColorSpace.jpg
It seems that when using Color Management and combining (illumination) and (CGpost) Pass Groups in a single layer with OpenEXR is creating this outcome.
I should add that changing the frame buffer dose not work either, same result with 8bit Int --> 32bit Float.
I have attached 2 images which show that by simply combining a CPost (cameraDepth) pass with an Illumination (beauty) pass creates a very different looking color space.
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Jun 20, 2012
Is it somehow possible to load .exr (OpenEXR) files with PSP X4? This format seems not to be natively supported, the Photoshop plugin does not seem to work
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Nov 24, 2013
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I am having something odd happening, I think it is new with 2014.
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I have a stb style (Bk 1.00), Color = black, screening 100, and for some reason it's not really printing full black.
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I have another layer (A-Fill-Bk) set to color 0,0,0, and also plot style Bk 1.00, and it prints dead black.
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I checked in the stb file, it is really set to black. I tried 250, as well as 0,0,0 and go the same result.
Attached pdf. You can look at the fence railing or the triangle chimney cap to see the comparison of the A-Fill-Bk which is printing actual black and surronding lines which are "almost" black. Zoom in and you can see it.
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bdpnp1.png
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I attached an example PNG file. Example PNG
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