Clément Foucault
3f6e14e667
The algorithm used is borrowed from : http://tuxedolabs.blogspot.com/2018/05/bokeh-depth-of-field-in-single-pass.html This makes it possible to have a decent blur for foreground over defocused background in one pass only. The algorithm is using a gather approach that is much faster than the scatter approach used in Eevee. This makes it possible to have custom bokeh shapes (not implemented yet) which would be impossible with a separable gaussian technique. The blur is done in 2 steps. The first one define the shape of the bokeh and the second that fill the undersampling. A downsample max-CoC tile texture speed up the gathering process.