Quick Effects Smoke Rendering as square I rendered a png file which has appeared as with a box where the smoke should be. There's also a screenshot of the materials setting selected which does show the smoke. Whats going wrong here? 






I don't think I have any materials for the emitter? The smoke is created from the quick effects menu.
You have no material in the smoke domain, so the smoke domain will render as a white box. 



Read the following link to set the materials correctly.

Rendering smoke in Cycles?