Every time I import something from Blender to unity3D and assign a collider + rigid body to the new blender object, the object just drops through the terrain like nobody’s business! Please help.
If you’re adding a mesh collider to your object, that’s why it’s falling through the terrain. Mark it’s mesh collider as ‘convex’ in the inspector, then it wont fall through.
Mesh against mesh/terrain ghost through eachother unless one of them is marked as convex. That’s the only way I know how to get them to hit eachother anyway.
Im not sure if this is the answer you are looking for but just in case you havent done so,
Dont forget to click on generate colliders on your imported blender model.
When you import a model and go to its settings theres an option that says Open, when you open that scroll down and check the box for generate colliders and hit apply.
Also if you are assigning a character controller dont forget to get the character controller to fit the size of the model.