light leaking under the walls

[adriano.ol]

Sometimes, rendering interior scenes, I experience strange external (sun) light leaking under the walls through the floor. This happens mainly near by doors. By increesing IM presets it is possible to reduce the problem.
Which is the specific parameter to control this?

[Da_elf]

this is cuz some of your irradiance map samples are being generated under the walls. or right next to the walls and their low settings cause some of the samples light to go through the wall to the other side. you can use in the advanced irradiance map settings the option for checking sample visability. this will help you out

[adriano.ol]

As simple as that!
Thanks a lot!