The steel studs are perfectly straight.
How to hide a huge gap between tile and wall.
This will give you say a perfect 3 8 caulk line with an irregular wall to counter gap.
If installed plumb and square the finished tile work looks amazing.
The line will continue maintaining caulk gap regardless of the gap of the wall to counter.
Tool the caulk by drawing your finger along it to form a concave surface.
The only thing to cover the gap would be to use 1 4 round molding.
Lay painter s tape along the edge of the countertop and the wall just above the gap to keep caulk off these surfaces.
With the uneven look you may need to shape the molding to fit.
Apply the caulk with a caulking gun.
Choose a color that matches the countertop and spread a thin continuous bead with no voids.
I foresee water getting in the gap and seams when cleaning the floor.
Fill gaps larger than 1 8 inch.
The other advantage to using steel studs in these areas is they don t warp or shrink.
If you have tile on the wall adjoining the tub select a caulk that matches the color of the grout.