Support 3D-tiles 1.1 export - not only the old 1.0 b3dm 3d-tiles standard

@OndrejTrhan

Two other important features for 3d-tiles export would be

  • to support using multiple texture image-layers, when one Model has been textured with multiple texture image-layers (texture01, texture names, etc). Demo here
  • to support packing labels from classification (either via the AI classification tool or Transfer labels from images) into tiles geometry since, quote glTF EXT_structural_metadata and EXT_mesh_features allow for storing and querying feature information from geometry attributes and textures. Demo here

See this showcase post of the 3DTilesRendererJS by Garrett Johnson for an illustration of both multiple texture layers and extra geometry attributes.