Lunch was the trigger :-)
I have made the mistake before: forgetting to rotate an image_map by 90
degrees around the x-axis before using it in a scene. As a consequence,
eval_pigment did not do its job correctly.
This is now corrected (see image).
[deep, strong voice in dark vault] Beware! Bewaare!! Always rotate your
maps! [voice recedes slowly in distance]
Thomas
