Camera projection bake to UV's creates seams

PixelApocalypse

Ok so I'm working on a project were a building is being destroyed. This is done with houdini dynamics.
Now because the building will collapse it's already broken up into parts in houdini and then imported again in maya with alembic.
I want to project a matte painting on this and bake it into the UV's.
The projection looks good in the viewport: http://i.imgur.com/liJo66H.png
When baked to UV's I get all kinds of seams though. http://i.imgur.com/MCAPxfJ.png
Now the UV's are a mess because they wouldn't export from houdini for some reason, my teammate had all kinds of issues with this so I just did an automatic unwrap and layed them out without any overlap and a bit room to spare for dilation. I figured this shouldn't matter, as it's a projection anyway, so the UV's don't matter. I tried dilating the whole thing but that doesn't fix the problem.

Any ideas how to fix this?

throttlekitty

Have you tried using Transfer Maps instead of Convert to File texture? Works like a charm. You'll need a temporary duplicate of your building to bake from.

PixelApocalypse

Not yet. So far I only tried Convert to File texture and mental ray Batch bake. But will batch bake it will also bake lights and that's not what I want.
Is transfer maps possible with a projection through a camera? Also not sure it will work since it's quite High poly. Bake will probably take ages in Maya. I could try though but won't I get the same problem with seams?

throttlekitty

I didn't take a screenshot when I posted, but yes you can use transfer maps with a projection. I'm not sure about if it's done via a camera, I only tested with a place3d node. It does a much better job with the seams than convert to file texture- I'm not sure anyone has ever really solved that. It's been years, but I thought you could bake with MR and not include lights?

PixelApocalypse

throttlekitty said:

 It's been years, but I thought you could bake with MR and not include lights?

If so I don't know how.

seb3d

 transfer maps can handle camera projection. no problem. also mr batch bake works fine without taking any lighting into account. just assign a surface shader to the object in question and plug your color map / projection there.

PixelApocalypse

ah cool tip about the surface shader. didn't know that was the trick on how to get rid of the lighting. Gonna try that.