I keep all my V4 and M4 textures in a special runtime in my external drive. The current Luxpose versions have had no problem with this.  The HDRFX folder is within Poser 8 on my C drive, so the exporter not seeing the path to the hdr image should not have been a problem. I should have copied the error message and saved it, but it did have something to do with the size of the HDR image, not it's location. If it is in regards to the focal length of the hdr image and my Poser scene, well then I guess for the moment, I'm not using IBL on export because I render at no lower than 38mm for my camera in Poser. Anything below 38mm is too distorted. I also now use very low level IBL lights with no attached image in Poser, and I don't believe that is supported at the moment on the Luxpose exporter.

"A lonely climber walks a tightrope to where dreams are born and never die!" - Billy Thorpe, song: Edge of Madness, album: East of Eden's Gate

Weapons of choice:

Poser Pro 2012, SR2, Paintshop Pro 8