How can I get better GI shadows?

[niksoftarg]

I am working on a interior scene light it with Skylight and I noticed that the bigger the number of the interpolation samples the more soft(it disappears) the GI shadows get.

[egz]

That's what interpolation does. Think of it as blurring. To get more accurate shadows you need to increase the Hsphere Subdivs.

[niksoftarg]

thank for the tip egz, I will try that.