Multichannel and Multilayer EXRs

Altus supports OpenEXR’s mechanism for multichannel (also known as multilayer) images.

When specifying an AOV, simply specify the filename containing the layer, followed by ::, and then the layer name.

For example:

pos-0=image.b0.exr::P
pos-1=image.b1.exr::P

Will tell Altus to use the P layer from images image.b0.exr and image.b1.exr.

By default, Altus will not output layers. Please see /usage/output-options.

Before 1.5, Altus has no support for multilayer/multichannel images.