Ambient Occlusion with a 3d engine

#1

Hi,
i wonder if there’s a possibility to render Ambient Occlusion (Dirtmap) with a 3d engine like Irrlicht? This would be great for rendering architectural models.
Thanks,
Chris

#2

Not in realtime. That’s why it has to be precomputed and baked into the diffuse texture or at least into a texture that can be used as an alpha channel. Engines like Source or Quake do this when compiling the map.

#3

i thinki i ve seen an ambient occlusion realtime fake shader developed by nvidia, just google on nvidias page

#4

Thank you both! Ambient Occlusion would be nice - precomputed or realtime. But I could not find any free or OpenSource Engine which provides AO. But most of them support Shaders, so I guess that I could implement AO as a Shader?

I found that PDF document about Ambient Occlusion and Indirect Lighting: http://download.nvidia.com/developer/GPU_Gems_2/GPU_Gems2_ch14.pdf

Is this what you meant? Can I create my own AO-Shader for any engine with that?

Thanks,
Chris

#5

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