AutoCAD Inventor :: Stainless Steel Sheet - Rotate Texture Through 90 Degrees

We use a lot of #4 finish Stainless steel sheet.

I have automated the changing of the active renderstyle to "Polished Brushed" to approximate this, but usually orientation is important. For instance, the texture will be around tube, and on large sheets, we want to keep all the sections orientated one specific direction.

I'd like to be able to easily rotate the texture thru 90 degrees (and possibly, a user selectable angle).

I'd prefer not to have to manually select a face first, either.