yes yes but have a liitle issue: the second part of fireplace is symmetry and if i select the edges of the original i simply can't bridge it. I press the buttom and nothing happen.
Nope, it doesn't work. I did everything as you said but no result. On screenshot there is stage after vertexes are welded with minimum value. Than when i click bridge (edges) - nothing.
Before anything, make sure to double check the red annotations on my screenshot, you need a clean topology for the next steps to work. And the green part is also a topology problem in this case, since you have applied a symmetry.
So, at this point you can apply an edit poly modifier over your symmetry, or simply collapse all to an edit poly to have 1 full mesh (no symmetry). After that, you will be able to bridge the edges. Just try with the bottom back edges (blue on my screenshot).
Take care of the center edges (yellow on my screenshot), may not be necessary.
Last thing, i believe that the part in green on my screenshot has been build or attached to early on your mesh, it broke the symmetry. You probably have overlapping vertex on this section, which is bad. Select element this part, detach and now proceed. you can reattach later.
Accepted solution
Okay so i did as you said except some things (the topology in mine case isn't in priority, mostly render result and general look) and it worked pretty good. Thanks for that!
