Difference in the daylighting illuminance between two simulation with the same conditions?

[mostapha]

This question has been asked several times. See here:

Different results on different computers

Radiance uses a stochastic sampling for calculation and 5-10% difference is expected. If you want to minimize the difference you can set radPar to be high. Also check this post on Radiance discussion group: http://comments.gmane.org/gmane.comp.graphics.radiance.general/2685 Mostapha