Re: taking speed build interior screenshots in The Sims 3???

if you want to take screenshots in build mode with out the grid lines showing  just go to into terrain paint and you wont see the grids ( hope that makes sense )

and in live mode  hit your tab key, and this will take you into movie making mode. Q key takes the camera down E goes up A,D = left, right and W,S= forward backward  Z and X zoom in/out you can also use your mouse to angle the camera

OH and if your uploading lots or sims to the exchange search for sims 3UIC by zindagolden you can use your screenshots instead of the default upload images

and I hope this is what your looking for