Noise in thin gaps between meshes in cycles I´m new at this and Im out of my depth. The problem is this: rendering in cycles, at some places of the model, specially in the thin gaps between different meshes (marked red), I get a lot of noise. See image attached. I´ve raised the samples, the bounces, etc... and it alleviates the problem but still persist. What am I doing wrong? Do I need to add even more samples? That would a pain.

I´ll add the render, world and material settings. I hope you spot something inusual. The file is quite heavy, so I´ll only waste your bandwidht as a last resort.
I´ve already tried to disable the bump mapping, in case it was that causing any normal problem or something, but it didn´t work.
Try this checkbox, I'm just wondering if it's the smoothing.

Edited to add:  This was not the answer in this case, but shade smooth can produce effects somewhat like this as seen in this example:

The auto-smooth option defines a cutoff where, below this angle, normals will be smoothed between the two faces.  For angles above this threshold the hard edge is retained.