Today I finished shot 2 of scene 6 in after effects by adding in the cgi set from blender (a blend swap product). I fitted it in with the scene and perspective then added all the lighting.
I then moved on to shot 3 where I started on the masking, I created the first 2 masks and started key framing mask 2 which was small and took a very little time. Mask 1 was quite a big chunk of the picture frame and I did 4 to 6 key frames. Then I exported / rendered shot 3 to the cgi add on folder ready for the cgi set add on project. It will be a background and reference for the cgi SET set up.
I opened the blend swap set in blender 3d and loaded up the background video / reference. I got the set up i wanted and rendered to the folder.