I was curious, would it be possible to use the webgl multidraw extension with the excellent Thin Instances to use a variety of meshes in a single draw call (although I understand that the meshes might have to share the same material).
The multidraw extension seems to have broader support now, including the oculus browser on the Quest 2.
cc @sebavan
mutlidraw is not supported by Babylon so far and you are right multidraw_instanced would do just that 
cc @Deltakosh and @Evgeni_Popov as multidraw could be a nice addition to our toolset but I remember we chose to not add it as most of the time outside CAD apps, different models would have different materials.
Hi, a common optimization with PBR materials is to have a single PBR material using atlas textures (so in 1 material you can have wood, metal, plastic, each one having its uv position in the atlas texture). With this, you could have what seems to be different materials in a single draw call. What would be nice is also to have the tool that generates this atlas texture and adjust the UV accordingly.
Iām not against the idea of adding it if someone wants to volunteer