Michael,

Thanks for the node links and Grasshopper recommendation. Brian and Ed have gotten me to the point of understanding that mapping between MoI 3D world units and pixels will be a problem. I could probably do it manually by putting some fiducial marks on the raster in photoshop and then manually place point objects on the fiducials as they appear in the 3D scene. I'm wondering if there's a better way.

I went through http://web.archive.org/web/20180705035034/http:/moi.maxsm.net/api and found these methods and properties related to background images:

fileName
hidden
remove
backgroundImageDrawOrder
backgroundImageShowIn
backgroundImageTransparency
getBackgroundImages
alignbackgroundimage
backgroundimage

In the GUI I can see View > Image > Properties Width and Height. Can I retrieve Width and Height in a script?

Are there any methods or properties that would allow me to find coordinates of 3 corners of a background image?

Can I find a mapping between the corners of the displayed background image and the corners of the bitmap file from which it was generated? In other words, map the corners even if the displayed background image is rotated, mirrored, or scaled.