No tutorial I'm afraid as I'm making this up as I go along! :lol
The simplest way to do it would be to model directly in Sketchup.
See SteveStarkillers thread on his Falcon interior build for a great example:
https://www.therpf.com/showthread.php?t=102451
Working directly in sketchup would probably be more efficient, but I'm familiar with the CAD package that I use and I wanted the highest quality model to allow me to create both a 3D printable version and one that I could derive templates from for a physical build at a later date.
Here is a quick rundown of my process:
I created a basic model in CAD as accurately as I could, using the traditional method of scaling from images and using the known kit parts to get close to the overall scale.
Once I had that done (which too a
lot of work in itself), I exported the model to sketchup and then used its "photo match" feature.
You can find a few tutorials on how to use it. Basically you use perspective lines on your model to set the vanishing points and establish the correct focal length and view for each reference image.
It is
not an exact science - especially when you are using analog based images (as in my case) that may or may not have been cropped and scaled.
It is also not really designed for images that don't have much in the way of perspective either (eg plan and underside views), but with a lot of fiddling you can get it to work on most images.
I found that I was continually tweaking the photo matches as the model progressed up until the main structure was matched. I haven't really messed with them much since.
Obviously, the more reference images used the better and in SU they are tabbed so you can flick between them.
Once that is done, you can compare your CAD model to the reference (as per the screenshot I've posted throughout the thread).
It's then just a matter of looking at how the part you're working on needs to be moved/rotated, changing it in the CAD software and then resending it back to Sketchup to check.
Rinse and repeat until the placement and rotation looks correct!