1.15 - Blendables

The engine already features complex post processing based on a graph of post processing nodes. The Post Processing Materials can be additionally inserted in some specific position. See FAQ r.CompositionGraphDebug to get a dump of the full graph. The graph is actually not only doing post processing but also some parts of the lighting. Over time we plan to make more parts be customizable through the material editor.

Blendables, also known as PostProcessMaterials, are Materials that can read the buffers then compose and modify them before they output on the screen. The easiest way to think of them is as a material overlay on the screen.