EDIT 2:

Well here it is, excuse my understanding of post processing and HLSL, it's my first time

So if there are bugs, it's probably over the top of my head on how to fix them.

Anyhow I hope it's usefull

Download shader: http://files.filefront.com/LightShaftrar/;13920138;/fileinfo.html





EDIT:

The lightshaft shader is done, though it very messy atm, I need to clean it up abit and find a better solution for making the VIEW that is being rendered black contain the same position and angles as the real scene, cause right now I do a while loop with ViewBlack.x = camera.x etc which is not nice, but hey, i'm a novice in HLSL and this was the solution I found for myself

I'll release it soon, just need to extract it out of my project and make it standalone with a small level, and probably some solution for that camera position / angle problem first!

Link: http://www.youtube.com/watch?v=-vZjq-K3nS0

NEW HD: http://www.youtube.com/watch?v=LBdlulbYNgI








Original post

Hello people, I'm using Nils "Slin" Daumanns radialblur shader and his God Ray IDEA to make Fake Light Shafts. I just extended it alittle bit with lite-c for making it stick to the sun_pos and fade out/in on screen corners.

http://www.youtube.com/watch?v=bWkfFrvWCJg

My problem is rendering the entire scene black except the SKY.
If I can get that to work, from there on I can handle the rest, but I have no clue on how to render everything except the SKY black into a texture. So being stuck at Step 1 kinda sucks =/

If I could get some help on that, I could handle the rest, as what's left to do from there on would be passing it as mtlSkin1 to the GodRay PP shader and then radialblur it and additive/screen blend it with the rest of the scene.

I also plan on releasing it as a small contribution from my side

Very easy do this, just do far negative fog, like this

set this material to view

Since it´s just a negative fog, not everything except the sky will became black...try to add a viewdependent material or something like this...

At least Crysis already generated the shafts this way, but Slin did a great job too

XD1v0: Hey, thanks for your help but that only makes the entire scene black except the panels and texts. Though I tried that with a normal lite-c fog with NOFOG flag enabled on the sky and it worked, but as you know I need it through a shader, and the one you contributed didn't work for me

Hummel: I wish I had the knowledge to do that I'm a novice in HLSL and this is the first time I tackle it =], though if I could get the above code to work, then I would be fine as the rest is easy =]


EDIT: I think I need a second view with lite-c fog for this to work, atleat with my knowledge, would be lovely though if someone could point out what I was doing wrong with XD1v0s code

Ops, sorry i give you wrong shader code, now its work fine

Lovely! It works Just a quick question though, it works only with bitmap skies, is there a way to make it work with model based skies aswell? Not needed but I just wonder

EDIT: Nvm got it to work with models aswell

The lightshaft shader is done, though it very messy atm, I need to clean it up abit and find a better solution for making the VIEW that is being rendered black contain the same position and angles as the real scene, cause right now I do a while loop with ViewBlack.x = camera.x etc which is not nice, but hey, i'm a novice in HLSL and this was the solution I found for myself

I'll release it soon, just need to extract it out of my project and make it standalone with a small level, and probably some solution for that camera position / angle problem first!

Witness the rays of GOD: http://www.youtube.com/watch?v=-vZjq-K3nS0

NEW HD: http://www.youtube.com/watch?v=LBdlulbYNgI

this is what i was talking about on the youtube comment of the previous video looks nice

Oh nice, this was something i was looking for , God Shaders. Though i think the rays are too much radial blured... maybe there could be attenuated usng a distance, calculation, depth view.

Because the rays are due to air dust, or other occlusion particles, and the ray will accumulate more and more opacity the more distant it gets, thus, dimming the light.

Looks really nice! Which shader model do you use?

Are you planning to contribute this? What is required to get it work (what do I have to do later when I'll try to add this to my scenes)?

Best regards,
Christian