I’ve recently decided to look into supporting subsurface scattering in my playground rendering engine Helix. It’s not the first time I’ve dabbled in the subject, but not being limited to crappy platforms I could push things a bit further. It’s a well researched and oft written about topic, so I’ve been reluctant to write up…
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…