How to combine passes with different bit depths into one .exr file?

[aida]

Somewhere I read that Vray is now able to combine render passes with different bit depths into one open exr file.
I'd like to have every pass but z-depth in 16bit or perhaps 8bit and z-depth in 32 bit. Is that possible? And how?

Thanks,
G.

[svetlozar.draganov]

V-Ray always renders/stores Z-Depth pass in 32bit depth, all other elements are saved with the bit depth specified in V-Ray output options here:


Exporting each render element with own bit depth is possible when saving from 3dsMax Render Output (VFB should be disabled in that case):

[aida]

Thanks for the info.

So if I understand correctly, when the checkbox "EXR/VRST/VRSM 32-bit output" is ticked, every element is saved as 32 bit float, if not only the z-depth is saved as 32 bit float and all the other elements as 16 bit float. Right?

[tashko.zashev]

Thanks for the info.

So if I understand correctly, when the checkbox "EXR/VRST/VRSM 32-bit output" is ticked, every element is saved as 32 bit float, if not only the z-depth is saved as 32 bit float and all the other elements as 16 bit float. Right?

Using 32bit EXR option the beauty and all elements will be saved in 32bit, that's correct. When you leave it in 16bit then all data will be written using 16 bit per channel except Z-depth, Velocity, Sampler info (Point type) and Worldposition render elements. They will be always in 32 bit.

[glacierise]

Hi guys,

What about other potentially large number elements, like worldspace position? This would benefit from 32 bit too. Also, worldspace velocity would be great to have in the samplerinfo, seems like it's there in Maya but not Max?

Thanks