text around cylinder surface

[olve11]

also that ring render have that 'squared lighting' on these surfaces (screen), I should toy more with Kerky settings or just make these surfaces smoother?

So Radi
Micheus have right. Of course before you use booleans on ring and text - use turbo smooth on your ring.
Then use booleans, define text with hard edges and then extract model to Kerkythea.