In unity3d i make GameObject > 3D Object > Cylinder And this Cylinder have the components: Cylinder (Mesh Filter), Capsule Collider, Mesh Renderer. I can add the last 2 components to my exported Cylinder from blender but i can't add the Cylinder (Mesh Filter) component. What is Cylinder (Mesh Filter) ? It's just a Mesh Filter component ?
Now i have some problems. I created some Cylinders in blender. All of them i did using Knife Project. And the last step was to click on Delete > Faces. If i'm not clicking on Delete and make delete faces it will not cut the hole.
The first problem is in the first cylinder i created in blender i cut a simple circle hole and it's working fine exported it to unity3d. But the next cylinders i exported for some reason when i'm looking at them from the front they are hollow i see the other side outside but if i'm moving around from the back it's not hollow. Not sure why.
In this screenshot the cylinders i exported and that are in unity3d. The one that is fine is on the left. The others on the right hollow like the hole cut was to the other side but if i will look from behind it's not open in the back:
In general my main goal is to create a cylinder in blender with a hole but big enough like in the first screenshot the right cylinders so i can walk in with my character. But the cylinders should be like those in unity3d but with a hold so i can walk in.