Hi guys

Not sure if this has been covered

But here is render,which I've done just,I've tried to set filtering to Crisp or Quality etc plus tried almost everything,but still is not crisp as should or what I've seen what people posted over here 

http://www.renderosity.com/mod/forumpro/?thread_id=2877297&page_number=2

Picture on Envsphere is 2048X2048 and is HDR

Is this limitation of EnvSphere or my HDR picture is just too small ?

Render settings are usual: Pixel samples are 6 and Filter is Sinc 3

 

Thanks for any help guys,Jura