[Bf-committers] yafray GI settings are not sufficient

[Gregor Mückl]

Hi!

I've played around with the yafray export feature for a while and I had to 
discover last night that it is very simple to create a scene for which the 
global illumination setting "Best" is anything but sufficient. The result is 
an incredible amount of noise in the image caused by irregular lighting.

I think you can recreate this easily by moving the camera inside a box and 
hide a lamp behind a plane near one wall of the box to simulate indirect 
lighting (I see this effect in a slightly more complex scene). No matter 
which settings you choose you will not get rid of the resulting jitter.

To fix this, one would need a lot more control about the light sampling done 
by yafray, which in turn means adding options to lamps which are only 
meaningful when used with yafray. Is this feasible? Do you want to follow 
this path?

Another nice feature would be a python-controlable yafray export (i.e. a 
render without a call to yafray). I'm willing to do implement this myself, 
but I have one question to start with: How is the export invoked in the 
normal case?

Regards,
Gregor