Nuke 3D projection

Today I went into he media labs to finishes off the 3D projection, I changed my background image from the church to the old hospital, I felt that the church grounds were too restive also it didn’t really fit with the images I wanted to use. The old hospital have this path that leads to the road and a block of apartments using the clone stamp I removed a car then exported the image brought it into nuke, from there the process was relatively easy I just had to re-arrange and re-line my objects so that they wouldn’t float off the grass. Based on where my brain was placed it didn’t make any sense for it to have a shadow so I tried to re-purpose it for the side of the eye but on the 1st attempt it kept jumping back to its original place 2nd attempt part of the screen froze and it kept skipping so I deleted it and started from the begin.