I have been working hard the last year on the model below. I am new to everything 3D that is modeling and especially 3D printing. I have however successfully concluded quite a good number of 3D prints which I created in blender with my Creality Ender 3 Pro so I have a bit of experience.
All this new experience for me started with the desire to do this project I have been working on for all this year. A complex 3D model of a knight's tomb which I would like to print.
As you can see Cura is clearly indicating that there is a need for supports in these red areas. The model will be printed in a 15 cm size. I have also managed to resize the model from a 22 million face mesh full of holes to a 900k manifold model.
However, when I slice it I get this.
As you can see supports are only generated for the outer column part. None are generated for the arches which are totally absent when the model is sliced.
I have tried to alter the model's orientation but with no result. I will try to separate this mesh in parts but it would mean restarting all from scratch since I found no good software to slice it precisely.
I am quite sure that the main problem lies in the fact the Ender 3 pro is an FDM printer an that the vertical lines of the arches are too thin. Since I tried to upload my model on 3D printing services to see if it could be printed in other materials and could be printed in finely detailed resin.
I would like at least to know if I am right in my problem spotting or if there could be any solution to the present problem so that not to go wrong if I will redesign this part.