Im looking for something to QUICKLY knock up sketches of a building project - 2d or 3d. I want to be able to play around with stretching the size / length of walls etc. Not that fussed about technical details - just something easy to use more important. Need to be able to send the idea to other people to work with and develop ideas. I dont want to spend any money but i will if its a proper mac osx looking app. The ones ive found in the past as clunky and look like windows applications that have been converted in a basic way. Any gems on the app store? Max ill pay is 10 pounds / 15 dollars.