Renderers like Kerkythea are atrociusly slow but they can recreate scenes with an incredible accuracy.

Just an example: in Vue you add a light and, let's say, set its power to 30. In FryRender you add a 60W tungesten bulb... and the program accurately models the spectral response and the conversion between the power of the illuminator and its luminosity. You need such capabilities when, e.g., you are checking some what-if scenarios about illumination assessing the effects of the different kind of lighting.

W.r.t. render times, you are almost into Terragen2 land... enough said!

Bye!!!

GIMP 2.7.4, Inkscape 0.48, Genetica 3.6 Basic, FilterForge 3 Professional, Blender 2.61, SketchUp 8, PoserPro 2012, Vue 10 Infinite, World Machine 2.3, GeoControl 2