bit depth by AOV

[edenexposito]

Hello,

It's possible configure bit depth by each AOV without create a new Arnold Driver?

I want a merged exr multi-layer file with AOV: Z and UV (32 bits full) and all others in 16half, but seems that I need configure a new Arnold Driver by each bit depth due I can not change bit depth in AOV preferences.

By this way I get two or more exr files If I want a mix of bit depth AOV channels instead one file. It's something strange due that If I analyze a exr merge file in 16half with latests version of Cryptomatte (beta3) this Cryptomatte AOV channel is inside in 32bits correctly and the rest in 16half, but I can not achieve the same result if I want Z, and UV channels in 32bits.

Would be great know If multi-part exr and custom bitdepth by AOV are thing to do in Arnold roadmap. I though that this two feature would improve Arnold user files/composition workflow.

I'm wrong?

[jfriedman7W638]

Arnold internally supports mixed bit depths in one EXR file just fine. All outputs in Arnold are defined by an array of output strings on the options, and if the string has a HALF token in the right place it means "render this AOV at half bit depth regardless of the settings on the EXR driver."

What Cryptomatte (Beta 3) does is if it's connected to a half-bit depth EXR driver, it switches it to full, but sets all the non-Cryptomatte output strings to half. If the driver is already set to full bit depth, it does nothing. The idea is to keep all other outputs the same as before Cryptomatte started messing with things.

In any case, this is a verbose way of saying that Arnold already supports mixed bit-depth EXR files, but not all of the *toA plugins expose this to users.