Introduction It’s been a while since last time, when I promised a general method for depth reconstruction regardless of projection type. I had told myself to do it “soon”. Due to lack of time partly caused by moving to Ghent and other random occurrences “soon” changed into “sooner or later” and finally we’ve arrived at…
Introduction [edit] To start things off more easily, I decided to limit this post to perspective projections and move on to the generalization (including orthographic projections) in a next blog post. When doing deferred shading or some post-processing effects, we’ll need the 3D position of the pixel we’re currently shading at some point. Rather than…
Introduction Image-space horizon-based ambient occlusion [HBAO] is a technique introduced by NVidia (Louis Bavoil et al.) in 2008. I recommend checking out the following resources to find out exactly how the algorithm works, this post will build on it further: ShaderX7 – Image-Space Horizon-Based Ambient Occlusion (by Louis Bavoil & Miguel Sainz) The original Siggraph…
Screen-space ambient occlusion [SSAO] and its siblings like Image-Space Horizon-Based AO [HBAO] are some of those techniques that I have a hard time loving. They can be great if done right, but really horrible when done wrong. Sadly, I have the feeling the latter is still the most common case in the games I get…