Did you generate mipmaps when saving your textures? Do they have a mat file. Static Objects such as a oildrum and their physics can be set in the editor thru the objects properties dialog.
It best to load characters that are to be animated in code as they will need a controller
To get an objects properties click on the base object in right panel of editor and enter the following lua script in the script editor ,and save it.
require("scripts/class")
local class=CreateClass(...)