How could I switch model in demo?

[wangfei]

Hi GeeXLab experts, GeeXLab looks great and powerful. I am a beginner for this engine. Would you like me know how to switch model and scene in demo? For example, the Mesh Shader demo, if the torus could be changed to other models, does GeeXLab support Obj format, or other format for importing meshes. That's great to know the ability of mesh shader if I could change the scene.

Thank you very much!
Fei