Render on cycles, textures and materials.
camera with depth of field.
Nice, I was thinking playing mario 3, 2 days before, it's sign of destiny ^^
Here's my try with Thea Render http://www.thearender.com/forum/viewtopic.php?f=21&t=18489 (I prefer yours because your mats are more refined than my quickly remade)
Great! :) Mario 3 is my favorite. mmm, dont know that engine.
Great scene and models, used a modified version of this to make a personalized christmas card :)