Merge3DLayer

Some of you have asked a similar question. You have multiple objects imported from sources like Google SketchUp and you are unable to move them all simultaneously. So, you in case you want to rotate them together. You usually would do this after you have finished playing around with all of the individual components. For this, you use Merge 3D Layer command found under the 3D menu. Though, sometimes you wont be able to do this, for this you need to follow the following steps.

First import your shapes individually from your source, make sure each element is in a separate layer. Then select one of layers.



Then, select one of the 3D camera view tools and go to the top of the screen to see your options.

Next, select the other layer you have identified, in this case the layer I have is "untitled".



Then, select the layers you want to merge and go to 3D->Merge 3D Layer.



Create the shape you need in photoshop, then export to google sketchup and merge in there. (this is how i did) =] Hope it can help! =]
 * Hi~ everyone... if your image can't be merge in the photoshop, here is another way to do.