EXR files with at least three channels are supported, but this is not the case for single channel EXR files.
Justification
Without single channel support a lot of use-cases are simply not possible. As EXR’s are a standard in the industry, a lot of programs depend on it or do have these files as a default.
Also, when using for example Megascan textures, they do come with EXR heightmaps and these cannot be read and later channel packed.
Photoscan textures in general are often saved as EXRs and these can’t be opened.
Implementation Details
No details.