Thanks for the report. I’ve added the missing gradient file and a complete version of the readme. In addition, I’ve improved the shading and re-tuned the presets.
Regarding the mouse issue you mentioned, I’m not sure because it doesn’t happen for me — try the latest version I uploaded to see if it works for you. If it still doesn’t, please send me a small project where it fails and I can take a look to see if there’s any extra calculation I’m overlooking (Also make sure to follow the instructions in the section "Interactive Scenes & Input Handshake" so that the scenes work and are treated as interactive. That section explains how you need to configure the scene so that the book recognizes it as an interactive scene and sends it the mouse events.)
