BlackHole Shader Overhaul(Scientific upgrade for SE)

【Must Read！】Installation/Update： ·DELETE the cache BEFORE launching game to ensure mod works: - For 0. 991. 50. 2140 or later，paste following path into Windows Explorer: %LOCALAPPDATA%\Cosmographic\SpaceEngine Then delete the `shaders` folder within it. - For earlier version，delete the `cache` folder in SE's root directory. Don't worry，delete it won't cause any damage，it'll be regenerated every time the game starts. ·After each mod update，the same cache-deletion procedure are needed to take effect. Alternatively，there is a way to avoid this：after deleting the cache once，open `main-user.cfg` in Documents\Cosmographic\SpaceEngine\config press ctrl+f to search and find "IgnoreShaderBinary"，change "false" to "true" after it and save. (Ensure the game is not running while doing this) This way，you can avoid delete cache once and for all. · "Interstellar Reimagined" have incompatible disk with this mod，makes Gargantua look strange. It's best to use "Interstellar for BH Shader Overhaul" mod. · Recommended for use with "Temporal Noise Reduction" mod. Summary SE's black hole has many inaccuracies，even after the General Relativity update. This is because the developer were unable to perfect the shaders due to the war（according to SE team）. So to make it more scientific，I completely rewrote the KN spacetime and accretion disk，used RK4 raymarching in Kerr-Schild coordinate and the observer 4-velocities & photon 4-momentum to calculate. I don't want to make any overstatements，but our project may indeed be the best real-time KN BH rendering in the world to date. Hope this can make up for the regret of the unfinished work in vanilla SE. This mod: 1. Fixed the perspective for free-falling observers. The old and new versions of vanilla SE use different observers（old version used static observer，sky shrink into a point as one approaches the horizon；meanwhile，SE officially stated that "new version uses falling observer"）. However，the new version is not actually correct. Due to the metric's