app.py

import gradio as gr
import os

def load_mesh(mesh_file_name):
    if os.path.exists(mesh_file_name):
        return mesh_file_name
    return None

demo = gr.Interface(
    fn=load_mesh,
    inputs=gr.Model3D(),
    outputs=gr.Model3D(clear_color=[0.0, 0.0, 0.0, 0.0], label="3D Model"),
    examples=[
        ["files/model1.glb"],
        ["files/model2.glb"],
        ["files/model3.glb"],
        ["files/model4.glb"],
    ],
)

if __name__ == "__main__":
    demo.launch()