@Exile : the squarre peices on the floor are so cool, brings a real detail attention !

@SchokoKeks :
Basic hand painted texturing is really easy (i made all painting under Blender until now)
What you need is to know some basic techniques like what patterns to paint (wood, rocks, grass, metal) and how to give some volume.

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I put my model wiht Unlit, and put a greatter ambient lightening, it's black ? (click to zoom in)



Sun , Ambient : Full White (255,255,255)
Model : diffuse , ambient : Full white aslo With UNLIT
The colors in game are darker than in teh editors WED and MED ?

MED preview engine preview : better


Solution : use lighetning for better colors popup !

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Problems and problems : i give up on Blender and 3D tiles for today and some days (tired)

Blender bug, :

I painted a trees, the texture were painted nowhere in no texture among the available ? but somewhere ahahaha ??
Texture painting mode : 3D models are displayed with textures, Edit/object mode : blanck textures ?
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the work is not lost, i'll have to take vertexs of each 3D tiles and save as object individually, before remaking a scene containing all of them !

What i learned :
Save lot of versions of what you are working on !!!!
Don't overwrite each time !
This way you have some history and can come back if something turns wrong !