Hi Alex,
Typically, I would say, create for each camera a UV tag, convert if needed, the Camera Projection into pure UV Data. But yes, we can take a look into getting one UV for all, perhaps not the best way, though.
The mesh needs some work. Attribute Manager>Mode>Modeling> Check Mesh. It results in 198 Bad Polygons. While trying to relax the UV mesh, I got the message that many polygons share the same edge. If more than two polygons share the same edge, we have a problem with this.
I created a new mesh in “Instant Mesh” and manually fixed the reminding problems; see the file below.
https://www.amazon.com/clouddrive/share/TANRudtJh7eA3upzizPlZ0d3SFYK1PCrwbIPrj5CcqY
Just merge it to your scene, select your materials of the “MainSurface” and copy those to the replacement, set the MainSurface to invisible (render/view). The materials set to not mix, no tile.
In the file here (not included in the link above), I colored the cameras (Attribute Manager>Basic>Use Color) to the colors of the test patterns in the scene. Since I’m not the art-director on this project, I have no idea what aesthetic/quality would be needed. As you know, and I write in a forum - so I share more details than you might need), a reasonable projection is undoubtedly closer to a perpendicular projection than to a tangential. Given the projection, for example, of Projector 4 (orange), the entrance/end of the wall would be perhaps pixelated/streak like. So, the density/resolution lowers there remarkably. Towards the wall end, it will be black. Again, I guess you are aware of it, but I like to mention it. The red camera (projector 5) will add some tangential rays to it, but as well not really sufficient from where I look at it.
Going back to your post #2, perhaps all of that would be simpler to have the non-merged files. So each could be seen by one or two working cameras, while others are set to “not seen by camera”, perhaps via Taking System, to allow for a fast switch.
These work cameras should be set on eye-level and cover every single part of the object. So, I check that merged file, and it was created, so far I can tell, out of 18 different objects—several of those like in layers, from top to bottom. In short, the left and the right wavy wall could be an element, the column, and the ceiling, as well as the rectangular object on end. However, these “stripes” are not connected to a certain degree, which makes it difficult.
See screenshot
https://www.amazon.com/clouddrive/share/zLkuXqz3zkdKUSF3C2lD9PE1AD3P02l8HlXYffS4Moz
From there, a wall “roll-out” could be created, as well as a column+ceiling. Which would allow for a nice bake out with something useable? However, I think to have working cameras as Take system might render faster what you might need. With having film-set like removable walls (Compositing Tag, Not seen by camera), things will get so much easier.
Let me know what you would like to do, and we can continue to explore the options, as in selecting horizontal edges and create spline from such, and use a Loft to create new geometry.
Edit: I tried to “harvest” splines from the geometry, but it needs to be put in all parts, to have no overlapping point. I have put a little XPresso together, and have a look at the screen capture if any interest is given:
https://www.amazon.com/clouddrive/share/fHgoHsq1LACq6KsXKR1Ns82jmTC1RMeXUCz6og0UKiz
/edit
All the best