How to properly name HDR images for use in DELTAGEN

Solution

DELTAGEN supports two types of HDR images: Longitude Lattitude and Vertical Cross.

Longitude Lattitude images look like panoramic images unwrapped from a sphere with increasing distorsion on the top and bottom parts of the image. This is the most commonly used HDR type. To be properly interpreted by DELTAGEN they use the suffix “_LL” in the filename (e.g. example_LL.hdr ).

Vertical Cross images combine one picture per viewing direction (top, bottom, left, right, front, back) into a single picture. They look like an unfolded cube and unused areas are black. These images need to use the suffix “_VC” or “_ZVC” in the filename (e.g. example_VC.hdr ).