I know the live boolean, but i dont quite understand how to apply a boolean without using dynamesh? "b" substract "a" with boolean, but how can i apply boolean to delete "b" without dynameshing it?
4R8........... :) If you mean can you use the subtool boolean features without Dynameshing, then no. There is a Meshfusion feature but it might not be suitable. And various ways of dynameshing/duplicating/projecting/etc. Show us an image of what you are trying to achieve and help might be more forthcoming.
You could do it back then with dynamesh, you'd just need a high resolution or a proper model scale to preserve details. You can do it now with Live Booleans.
Yeah you would have to dynamesh at a high resolution not to loose detail, then if you want your mesh back to a form that can adjust sub d zremesh the result.