I am having trouble importing a 3D model from Blender into Gazebo. I have seen many tutorials and other questions similar to this one but they have been no help. I test the .dae and .stl files by re-importing them back into Blender and they don't come out as they should. I would have uploaded screenshots of my issue but the picture files were too big for this message. If anyone can help me, I would be glad to communicate over email. Thank you.