polygon overlap > light cache going to infinite

[lrivero]

some freelances have built a few models for us using the "extrude" modelling method.. it means that there are a lot of polygons one in front each other in the same place overlapping

this is making the light cache is going slower and slower until it reaches the 85% of the calculation of the light cache and then... it seems to be stopped, the estimated time is growing in real time... 1 hour later the estimated time is 1 hour bigger

trying the same scene without these models (with almost 100million polygons of vegetation, furniture, etc) light cache works perfect

thanks for your comments!!

[jacksc02]

you can adjust the secondary ray bias to .001 and it can help in overlapping geometry situations