Hi, Thank you Clotilde and Jan. The ra_xyze command solved the problem. I am actually using a fish eye lens (the -vh 49.0537 -vv 49.0537 was in the original image created by hdrgen) but I am passing view info in the evalglare line). I have few follow up questions to make sure I understand what you mentioned regarding view type.
1. Assuming I have an angular projection, I converted that to hemispherical projection using pinterp, and used that for Ev calculations and absolute calibration, and then for evalglare. My question is: Is a hemispherical projection a requirement for calculating vertical illuminance in Radiance? If yes, should I convert back to angular after calculating Ev? 2. Is there a way to tell if projection is Angular or hemispherical by looking at images? I am using a low-cost Opteka 0.2x fish eye.. there's no mention by manufacturer on projection type. Thank you for your help, Belal
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