Investigate the use of N^3-tree for voxel rendering

[Avokadoen]

https://developer.nvidia.com/gpugems/gpugems2/part-v-image-oriented-computing/chapter-37-octree-textures-gpu?fbclid=IwAR1iQ3i-t28gnm_XwP-MViIY11C4V9jjKniQonVQAbXym3BXcZ2muIofjWQ

[Avokadoen]

Steps:

• [x] implement square buffer (squares can and should live in the octree texture)
• [x] implement a hit square function
• [x] create a shallow octree texture (8pixels)
• [x] debug assign some of the pixels
• [x] implement octree traversal
• [x] create a 64 pixels texture
• [x] debug assign some maybe with a noise function
• [x] repeat until we have desire maxsize