Thanks for the file, JanSidiwck.
I have attached two files in this link:
https://www.amazon.com/clouddrive/share/gzPARPGox6qHaOqABUFGL6hHkgsfBEkB5yXLsfNmoNp
The first file (…_01.c4d) contains a quick workaround, with practically not modeling effort at all, just procedural.
You need to find a balance between dilate/erode and smoothness, given by the growth in volume you are targeting. Perhaps not the aesthetic you are after.
The second file (…_11.c4d) shows clearly the source of the wrinkles, or as you can see on the left side, how to avoid those.
In short: the model needs to be based on a clean flow of Quads (four-sided polygons) and those preferably in a similar square size.
Screenshot:
https://www.amazon.com/clouddrive/share/3nZTXAsYnuCgrny2uGhHg1YPDuof72DuJTq8BFBdGPN
The model on the right in this file was very quickly modeled, and it shows, there are artifacts, but not as much as in the native MoText object.
Especially with the font you use here, I can’t really see a quick fix in terms of modeling, to blow them up smoothly.
The Weight Tag is an option, not a piece of the mandatory information, but since there is typically a welding-seam, it has more influence on the final shape.
All the best
P.S.: to use the letters:
https://www.cineversity.com/vidplaytut/polygon_pen_part_07