Better Reference Images in Rhino
So adding a Reference Image in Rhino has always been a pain--though more simple than most other 3D Programs. Unlike 3DMax, Maya, UDK, and so on, where you have to apply the image to a surface like a material, Rhino has a Background Image option built in.
Great.
Except if you want to add it in mid-way through your project. It is not only difficult but near impossible to match the image to your project through this system.
In comes... PICTUREFRAME
PICTUREFRAME > Select your image > Add the frame (don't worry about scaling or fitting it yet) > SETOBJDISPLAYMODE > MODE > RENDER
And viola, you will see your image in the frame. From there you can scale, rotate, and align it to your drawing already present! I like adding a few lines to the image, grouping the image+lines together, and using the points in those lines as I manipulate the image in to position.