Paintstormstudio.com

Hi.
I bought PSS two days ago and it looks great. But I have one big issue. ALL the brushes are really slow. And it's very frustrating. What could be the problem. Used to work with large images and brushes I Photoshop without any problems.

What is your graphic card model?
All photoshop brushes are very simple and have default spacing not 0, it's a little faster maybe 10-20% not more, but the mixing brushes of Photoshop is much slower.