alpha off without seing environment

[WhyGee]

Hi,
Often times (in IPR) when I have an object with post effects turned on and premultiply alpha enabled the post effects are cropped by the alpha. Turning off premultiply fixes the crop but now there are artifacts along the alpha border. So I tried turning off alpha altogether to preview the post effects but then the environment appears even though keep environment is turned off.
If there is a way to preview this that I've overlooked I'd appreciate an explanation. If not, it would be helpful (preferably in the IPR itself) to be able to either disable alpha without seing the environment, or in the rendertarget, having keep environment off and alpha off at the same time not showing the env texture.

Thanks!
Yaniv