[Bf-cycles] Bf-cycles Digest, Vol 6, Issue 14

[Sanne]

Hi Andrew!

On Saturday 22 October 2011, Andrew Price wrote:
> *>Cycles expects latlong maps, is that the format you used?*
> No I used Angular. Thanks for clarifying that. I'll use LatLong in the
> future.

In case you (or others) need to convert HDR andgular maps to latlong aka 
equirectangular, here's how you can do with Hugin [1], a free panorama tool:

1. Assistant tab, load images, load your angmap with lenstype: full frame 
fisheye and HFOV 360 degrees.

2. Stitcher tab: set projection to equirectangular, optionally click on 
calculate optimal size (read the tooltip), set output to high dynamic range, 
format exr, hit stitch, voila.

This can be mapped as an environment texture (not image texture), a mapping 
node, and generated texture coordinates. 

Node setup: http://tinyurl.com/6zvv23k

[1] http://hugin.sourceforge.net/

Sanne