Optimization

Chunks

Chunks would be the equivalents of the octants in the Gridmap, the chunk property of the map loader is the size of the chunks. A chunk of size 6 would be a square of 6x6 blocks.

Merge Options

• None: Don't merge anything, will leave the block intact.
• Chunk: Merge each chunk separately.
• All: Merge by level, meaning each Tilemap.

I recommend:

• Merge the meshes by chunk, so they can be still be easily culled by distance or other methods.
• Merge all the colliders, since less colliders the better.