Hi, I've got a simple question:

How do I calculate / get the screen-space coordinates of a pixel in an object shader?

screenpos = (mul(matModelWorldProj, pos).xy*0.5+0.5);

or what should also work is VPOS: http://msdn.microsoft.com/en-us/library/windows/desktop/bb509647(v=vs.85).aspx#VPOS

Thans a lot, vPos does the job:

float4 screenSpace : vPos // input semantic

float2 texSS = screenSpace.xy / vecViewPort.xy; // screenspace coordinates

Dont forget the half-pixel offset!
That's what I use:

I just noticed some strange aliasing and found it out myself

Again, thank you very much!

...and now my deferred lighting works

Nice!

But now I've got the problem that I need to render the deferred lights into a specific texture, not the camera's .bmap
Does anyone know a good method to do this?

use the material event and a second stage
camera material renders only the scene, the second material only lights
just use ENABLE_RENDER