Screen-Space Ambient Occlusion( SSAO )

[Enzi]

Some new screens:

ssao+ibl+ no tex



ssao+ibl










edit:
Just for your information, no Texture except the HDR map was used in the city scene.

[AriusEso]

Very cool man. 

[Mietze]

Very cool! This is a good combination! Hope you enjoy some parts of my code

[Enzi]

Actually I had the whole implementation before I found your project. I looked at it and it would have saved me a lot of time. But nevertheless, I learned a lot.

edit: Oh, and I'm using a perspective projection. I haven't found the sense of using orthographic yet. 

[Mietze]

edit: Oh, and I'm using a perspective projection. I haven't found the sense of using orthographic yet. 

The good thing with using an orhtographic one is, that the different splits don't overlap as that much

[amerthebest]

Could you share you source code with us please?

Thx

[lovetv3d]

[Enzi]

What's up with that image. I know it's from Leadwerks and that his approach was more an outline shader than ssao.

[Enzi]

After some time I disliked my ssao and today I rewrote it completely. After 12 hours in Rendermonkey, here are the results.

Bigger radius


Smaller radius, perfect for humanoids


There are still things to improve. Scaling the radius with the current depth a little better would be the first thing that comes to my mind.

Oh, and the shader is super fast.

[Zaknafein]

Looks awesome. Are you going to releaase that?

[sybixsus]

I agree with Zak, awesome. The new version has a little more noise, but the overall effect is much better. I second the question whether you're going to release it.

[AriusEso]

Yea, looks great.

I have been thinking about mine and maybe including some IL in there too.

[Enzi]

Indirect lighting? In terms of color bleeding? There is a quite nice approach on gamedev and in the ogre forum from nullsquared. The results are pretty good but it uses a lightmap. There has to be another way to get this right. I was thinking of a map where the geometry is just output with no lighting at all. Just the albedo. To increase the emissive you just scale the needed object.

I don't know if it's a dumb idea. I really need to sit down and try it out cause it's bothering me a lot. Maybe it's working for simple objects like spheres and cubes.

And don't ask me why I don't want to use a lightmap. I really can't tell you why.

@Release:
It's too soon to tell if I'm going to release it. I'm sorry. I can only tell you that the way the algorithm works is the same as the one that is floating around in the internet, the one from Arius, Unreal or Crysis. They all are doing the same. Taking samples via a random normal texture and compare it to the actual depth.

@Noise:
Unforunately it's something you can't get rid of. Unless you take much more samples. In my previous picture (the one with the dinosaur) I used 16 samples. Now I only take 8. I think it's a great jump in quality but I really have to see it in a real scene. If the noise is seeable I have to increase the sample rate. But I guess, because of the low frequency of the noise it's hard to see in a fully lit scene. At least, I hope so.

[AriusEso]

I was looking at SSDO: http://www.mpi-inf.mpg.de/~ritschel/Papers/SSDO.pdf

( thanks to ZaPP - I think it was him that threw that url my way on IRC ).

[Aurora]

@Release:
It's too soon to tell if I'm going to release it. I'm sorry. I can only tell you that the way the algorithm works is the same as the one that is floating around in the internet, the one from Arius, Unreal or Crysis. They all are doing the same. Taking samples via a random normal texture and compare it to the actual depth.

You should release the shader when you are done, ofcourse you did use alot of time creating it perhaps, but not much reason for 20 people to make the same thing 20 times right

You can always sell it for like 1$ with excample on how to use it or something to make a bit of loose cash, then people have the options at least.

Just a thought

[Enzi]

Again, I rewrote the algorithm. It's working now with the delta of the actual ViewSpacePosition of the random point instead of the currently processed depth and some other tweaks of course. It looks cool with both.

Here are some new screens:







64k triangles, performing with 120fps on a 8800GTS 512

[Raine]

One of the best implementations I've seen lately, kind of like the one I've seen on gamedev.net (glsl code tho)

[Zaknafein]

Amazing. The white background makes a huge difference, it almost looks like the model scatters light.

[AriusEso]

Yea, that's exceptional. 

[uncasid]

Any plans on releasing that shader?