strange shadows artefacts

[geck1]

this is realtime window shot , anybody know how to fix it ?

[guest84672]

This is probably related to a low polycount. Can you increase it?

[geck1]

there is about 2 mil polys .

[guest84672]

But you also have a lot of detail. Send me the model and I will take a look.

[geck1]

please : http://www.mediafire.com/?6f9fbnv3sudze7y

[guest84672]

it's about 4M polygons - looks good in 3.1. Are you using the latest? What lighting environment are you using?

[geck1]

i am using 3.1 version and environment is default conference

[guest84672]

Let me investigate ...

[geck1]

there is something wrong with this shadows (it's render).
tested another hdr's , looks much better .