It seems that that kind of .exr format isn't supported by TinyEXR

It seems that that kind of .exr format isn't supported by TinyEXR

It's strange because these EXR files load just fine in Godot, which uses TinyEXR. I remember TinyEXR gained EXR compression support relatively recently, which is required to open many EXR files out there.

This is the copy of TinyEXR used by Godot: https://github.com/godotengine/godot/tree/master/thirdparty/tinyexr

See its third-party notice too: https://github.com/godotengine/godot/tree/master/thirdparty#tinyexr

I replaced tinyexr.h with the version you linked and I still get this:

I went through the debugger and it wants texture compression format 8 however the library only has these

#define TINYEXR_COMPRESSIONTYPE_NONE (0)
#define TINYEXR_COMPRESSIONTYPE_RLE (1)
#define TINYEXR_COMPRESSIONTYPE_ZIPS (2)
#define TINYEXR_COMPRESSIONTYPE_ZIP (3)
#define TINYEXR_COMPRESSIONTYPE_PIZ (4)
#define TINYEXR_COMPRESSIONTYPE_ZFP (128)  // TinyEXR extension