Terry Herc has just published an RPG-themed DIY version of Rory's Story Cubes, provided as PDF templates:
Instructions for cutting up and gluing the templates over D6s are provided in the blog post, as well as images for creating over 200 different brainstorming dice.
https://terryherc.wordpress.com/2018/08/18/spark-dice-a-story-writing-tool/I am a huge fan of Rory’s Story Cubes, which I discovered a few years ago. The core concept is that these d6 are printed with unique and evocative pictures, and you roll them and link the images together to create a story. As soon as I heard about these, I latched onto the idea, and I found them to be incredibly helpful when I got stuck.
Instructions for cutting up and gluing the templates over D6s are provided in the blog post, as well as images for creating over 200 different brainstorming dice.