wasd to move arrows to look around. use c and space to go up and down. g and h to show and hide meshes o to open a mesh i to import an obj file (scroll down to see more) k to delete a mesh import: to import a file press the i button type the name you want the mesh to be leave blank to use the obj mesh name then press the ok button (check mark) if you want to resize the mesh type the number you want it to be resized to. default is 5 open the obj file you want to import in a text editor. copy all the text then and paste it into the answer box and hit the ok button. preferably use obj files made in blender but it should work with other files. this might not be able to open a obj file with multiple objects in it.