Shadowing noise issue

Hi guys!

It’s my first comment/thread ever here and I’ve thought you could help me with a little shadowing issue i have :spin:

Please check out this renders (a shadow pass and a normal render) and tell me something if you have any idea of what that horrendous noisy shadowing could be. I used internal renderer and no compositing (besides the shadow pass).

I have intel core duo, 4gb ram, 2gb mobility radeon card

Thank you! :slight_smile: