Got a screencapture from a friend, looks like UVs/textures with a 2:1 ratio are not properly displayed on iOS devices. Other models on my website (1:1 ratio) look fine. Link: http://dennis-lehmann.com/#m4a1-viewer
( I'm from Sketchfab ) We try to display the model as fast as possible even without all the resources. You can add ?waitresources=1 in the URL and the viewer will wait to have all resources before displaying the scene. Right now we are using original textures uploaded by the user (or the closest power of 2 texture we can…