Added icons, fixed some ui bugs
Commented out scenekit shadows render
SceneKitRenderer runs but produces black texture.
Shadow pass via SCNRenderer drawing ARPlanes attempt but changing metal version to 2.4 in order to support function pointers in fragment shaders makes the conemarchFunction crash metal :(
Load PostFX w/ parameters from plist
optimized raymarch by setting max depth to the min of the world depth and the max raymarch depth.
Added license and moved readme to root
Added some distance fields and post fx
starting distance field abstraction