PARAMS:
rh
: rotation horizontal, for example rh:-45
rv
: rotation vertical, for example rv:15
s
: size in pixel, for example s:128
var
: name of the material variant (if applicable) which should be rendered, for example var:street
GLB_URL: The URL of a GLB/glTF model, for example https://raw.githubusercontent.com/KhronosGroup/glTF-Sample-Models/master/2.0/MaterialsVariantsShoe/glTF/MaterialsVariantsShoe.gltf