Splat decimation

[kennethlynne]

I'd like to suggest adding support for different splat decimation strategies for generating LOD offline.

Input the highest quality possible, and pipe it through some naive solutions with room for more strategies in the future.

[PLAN8VR]

Yeah, I guess it shouldn't be too difficult to add an octree type decimation, with a possible adaptive increase of splat size to compensate for the missing data? (Says person with no programming ability himself! lol)

So remove 50% of splats + double size of remaining splats.