Space Nebula and Starfield Plugin ✧ V1 + V2 + V3 ✧ for UE4

@SMRobust
yeah, thankfully we where able to solve this via email. since we have some prototyped extensions for android/vr, there are also some implementation of the renderer without separate reaolution-buffering. any advanced user may feel free to ask for this.

though the current plan is some major reimplementation with global shaders for hierarchical details and stuff. so those buffering/occlusion will reappear completely different in the future xD