Creator's Toolkit
The Creator's Toolkit slide deck is available at https://docs.google.com/presentation/d/1m3nbi0_UsLxYiE5G5XHNzczY6mZNi2SBfDVjQiU9jbc/edit?usp=sharing
For a step-by-step walkthrough of creating a world and uploading a model, see Getting Started. For model preparation tips, see PBR Materials.