how to spray for achieve mural effect on the floor or on the wall?

chamanec

Does anyone know a trick, or where to buy that spray?

PC121

It depends on the surface that you want to spray on, if it's not a single texture but a large one divided into multiple pieces, your spray will be cut off as soon as it reaches the next piece. 
If you found a suitable surface, play with the angle of your sprays and you'll find out which angle works the best for big sprays.