IAmNotHanni
commented
9 years ago I've read David Scherfgens book about game programming. There are 3 common ways how to implementfog:
- linear fog: f(d) = (End - d) / (End - Start) where "d" is the depth of the Pixel/Vertex
- exponential fog: f(d) = 1 / (e^(d*density))
- quadratic exponential fog: f(d) = 1 / 1 / (e^(d*density)²)
In tesseract a different fog model is used which does not simply cuts the fog at a specific area, but instead uses a model which is distance based (a radius around you). that looks a lot more realistic since hidden stuff does not become visible because you turn your head. and according to eihrul it is not even noticeably more expensive.