First of all I’m very new to 3D and everything related to it.
I’ve started few times ago and I want 3D model from photogrammetry of very ancient object. My first models were quite good I think and they were all in HD (see this example here : Archéologie Mali - 3D model by Aikio Corp. (@aikio_corp) [9dc718d] - Sketchfab). But I noticed that all the models I’m uploading now have very bad quality and not in HD. I use Metashape and the models are very good in this software but everytime I upload them to Sketchfab I lost quality. Is it because of how I export my models ? Is it related to the fact that I have not a paid subscription ? Can you please help me ?