For crazzy textures the free SumoPaint online is some sufficient! https://www.sumopaint.com/home/#app (Flash Player must be installed)
Free SKetchUp Make 2017 : https://www.sketchup.com/fr/download/all#fr
Free Real Time render SimLab Composer Lite : http://www.simlab-soft.com/3d-products/simlab-composer-lite.aspx (maxi 1920 *1080)




Of course Moi--> OBJ --> SimLab + SumoPaint is possible! ;)