- SSELODGen recommended settings (The one I use, if you have a better idea, tell me I'm not an expert):
-- For the 1k version (recommended):
--- Object Lods : CHECKED (you don't say :p )
--- Build Atlas : CHECKED
--- atlas size : 8192 * 8192
--- max texture size : 1024
--- in UV range : 1.5

-- For the 512 version:
--- Object Lods : CHECKED
--- Build Atlas : CHECKED
--- atlas size : 4096* 4096
--- max texture size : 512
--- in UV range : 1.5

-- For the 2048 version:
--- Object Lods : CHECKED
--- Build Atlas : CHECKED
--- atlas size : 8192 * 4096 <- yes, most of the texture will not be in the atlas, so 4k*8k is enough
--- max texture size : 1024 <- 2k texture will be used as is and will not be included in the atlas
--- in UV range : 1.5

-- Eventually build tree Lods if you want, you need billboard for them. I use -3 for tree lod Brightness.

-- Eventually compress the diffuse atlas created by SSELODGen to DXT1a
with paint.net as I said before, it may help if you are low on vram
(40Mo are saved if you use the 1k version)