Neon22: I'm still in need of HDR images so I've been tackling the ImageMagick HDR issue, but I'm not a (modern) programmer and I'm getting in over my head. I managed to compile ImageMagick with VSC++6, but the code is old and the OpenEXR files are much newer and at this point I'm getting overwhelmed. I'm attempted to rope in a friend who is much more savvy.
That issue will affect my ability to tile large HDR images.
I still have the other issue of getting Nona to tile HDR images for me.
I read through the latest Nona header file and it WILL recognize EXR files as an output.
I tweaked your nona script to pull in and output EXR files. It stitches great but the EXR is a faux HDR file. The dynamic range seems to be that of an LDR file. Converted to HDR, opened in HDRShop, dropped the exposure, my sun just dims along with everthing else. I've confirmed that the original EXR cubefaces don't do this.