Wall and floor of first level are garbage materials, formely use for room's ceil. (All my project are done with a maximum of garbage, it's cheaper
)
I put on it some plastre, mix two colors of glycero paint, and ... paint
Lightning are 4 superflex leds (large angle) with a 12V power supply.
For Droid 's room, I will use different leds, on the picture, only 1 is done.