3Run: No, the portalshader shouldnt be sooo performance eating.(maybe you are using to many portaliterations, the distance how far you can see through an endless portal tunnel)
Can you tell me your rig o.O?

EDIT: keep in mind that a demo is most of the time created with older/non performant code.

Last edited by Rackscha; 07/15/12 11:09.
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