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.

I just runned the demo, and walked around and it was jerking (fraps shows about 30 fps when I run demo with it, but without it I still get same jerking movement and low fps). What you mean by rig?

rig = hardware specs of your computer

Just trying also my first footsteps with shaders:

Wavefield Shader
http://www.youtube.com/watch?v=AZB0lqzTud8

looks nice

I'm working on new bullet impact particles, using physX with models:

Screen shows early stage of random physical gibs and wall decals, haven't added smoke, sparks and other effects yet.

my rig: AMD Athlon(tm) II X4 640 Processor 3.00 GHz, 4 GB RAM, 1 GB GeForce GT 430

Hi everybody. My last game is 'BallsMaster', Please check it out here < http://www.mediafire.com/download.php?0tcindfdngdklj4 >. It's open source. It's in romanian language( because my english is not too good ) but it's easy to understand and it is funny enaugh.Please try it. Please feel free to reply to me at my email < senior_nemesis@yahoo.com > Cheers!

@3run Awesome !

working on my first HUD element - the two HP Systems:

please add more contrast to the heart and numbers. it's too difficult to read