polynurb wrote:Tom, what does the PS image look like when converted to 16 or 8 bits?
i didn't mean to sound clever here... i was really curious how your particular image behaves when converted to lower bit depth!
search the forum for "hdr and aliasing" back from 1.71... and i would assume that what we see i your image is due to similar display limitation of HDR data on standard computer screens.
when viewing an mxi via maxwell.exe, my guess is that it takes care of the proper conversion and displays the brightness clamped to something within the display range, but when saving as hdr and opening in PS, some detail in bright areas might look different, more exposed or aliased along very contrasty edges.
if you move the exposure slider in PS (the slider at the left bottom corner of an image if in 32bit mode), you will see a lot of banding with many hdr (even with very good ones!)... it will go away once converted..., but ultimately only editing in 32 bit will give you access to the full information of the mxi.
there are a few hdr conversion methods (when going 32>16bit) in PS that might help with such overexposure.. like local adaptation or highlight compression which then can be recombined with the original HDR to get rid of certain unwanted artifacts.. at least that is how i do it..