Light artefact

[vermu]

Hi,

I am rendering exterior shot and I have one problem area. I get light splotch on the spot where pergola beam connects to the wall. Other than that the render is clean and nice. I am using irradiance and lightcache. What is usually causing this kind of artefact and how to get rif of it? If I render in lower resolution it's not visible.

[kriscabrera15]

your problem is light cache having some light leaks, i would use brute force or, not use GI, i would stick to to a dome light and a sun light

[MoonDoggie]

Try upping your LC Subdivs, 1500 or so.

[vlado]

Like Colin suggested, increasing the light cache subdivs might help; you can also try enabling the "retrace" option for the light cache.

Best regards,
Vlado