eevee_ambient_occlusion.cc File Reference

#include "eevee_ambient_occlusion.hh"
#include "eevee_instance.hh"
#include "GPU_capabilities.hh"

Go to the source code of this file.

Namespaces
namespace	blender
namespace	blender::eevee

Detailed Description

Ground Truth Ambient Occlusion

Based on Practical Realtime Strategies for Accurate Indirect Occlusion http://blog.selfshadow.com/publications/s2016-shading-course/activision/s2016_pbs_activision_occlusion.pdf http://blog.selfshadow.com/publications/s2016-shading-course/activision/s2016_pbs_activision_occlusion.pptx

Algorithm Overview:

We separate the computation into 2 steps.

• First we scan the neighborhood pixels to find the maximum horizon angle. We save this angle in a RG8 array texture.
• Then we use this angle to compute occlusion with the shading normal at the shading stage. This let us do correct shadowing for each diffuse / specular lobe present in the shader using the correct normal.

Definition in file eevee_ambient_occlusion.cc.