bucket/fill in sculpt mode

I’m pretty sure this is not possible in blender but would really save my life so if anyone could help would be great!

I have a dense geometry that I have to deeped the holes, while leaving the top area unnafected, I can do that in sculpt mode with the Fill/Deepen brush, but since it is a very geometric model, I need to apply it uniformly all around it, is it possible to apply the fill/deepen brush all around it uniformly liek a bucket tool on paint software? Because If I use the brush it will be very uneaven.

Or any other solution to the problem you might have would be great! thanks.

Displace modifier with a texture/vertex group.