@Kartoffel: Very nice and useful, though Hummel already did this some years (?) ago with his bacterium.
I've had a look at the source and it's pretty simple and fast but could even be a little faster:

float zProj = pow(abs(dot(input.Normal, float3(0.f, 1.f, 0.f))), ProjectionPower);
is obviously the same as
float zProj = pow(abs(input.Normal.y), ProjectionPower);
which can be shortened to
float zProj = input.Normal.y*input.Normal.y;
as ProjectionPower = 2 apparently gives the best results (the same goes for zProjx/y, of course).

EDIT: Thanks for sharing!

oh, of course... didn't see this
Thx for pointing this out

EDIT: about Hummel's 'Ehec' shader: I saw his shader but I didn't knew he was using the same technique

Very cool and very useful. Thanks a lot!!! I'll guess I'll turn that into a terrain shader.

looking forward to see the result

trying to get more FPS by using a lightmap for static objects and pssm for units only (it can never be perfect I know):

for far awaya soldier you could use some simple Blob projection shadow, you'll gain lot of FPS.
Shadows are what east lot of power in 3D ! Some games you put them off/on and you can gain/loose half FPS sometimes.

@Kartoffel
Sounds cool. I have no clue of making shaders, iam happy i can use them

Hope ull find some time to work on that project.

edit:
@sivan
How much FPS do u have right now ?

yes, with decal shadows it is much faster, but combining pssm with decal shadows is possible only by ent_decal that requires a short c_trace for each unit in every frame, which becomes also expensive as unit count increases. I want to use c_trace for units only when they are walking not on terrain, I mean normally they are using stored surface data. but maybe there is an optimal combination I have not tested yet. maybe pssm shadows should be somehow clipped over a certain distance, but until now I could not modify the pssm shader successfully, maybe I need a more simple shadowmapping system.

a video of the same thing as above:
http://www.youtube.com/watch?v=HlZmZNBSfWY&feature=plcp

sivan@ what is wrong with the tree shadows? no alpha support yet?