Thanks for the tutorial and for Tamara for this nice software.
Keeping the images 150x150 to 100x100 is good. I found to place scale/offset to 0.015 good (the "paintings scales to 2 x x2 meters or "human scale")
The position must be set BEFORE, in the World Picture editor when exporting. As the painting will have more than 10000 cubes, is not good idea trying to move it in the editor of the game.
If were possible to include patterns or texture pictures in game would be nicer but it seems the game doesn't allow it. Including it as pixelate 3d object is something beyond my imagination. Thanks.
Really good job.