Add support for layers in OpenEXR
Description of the feature
OpenEXR supports layers. The Gimp EXR plugin does only load the first one. Please add support to open all layers. This is a file with three layers. art021.zip
And here is an video how they are used in Blender and Affinity Photo: https://www.youtube.com/watch?v=pjpOOrdpq2E&feature=emb_logo