Here's the shader for the trail material:

Yup, DOTS is perfect for boid simulations. I mostly mimicked the boids demo from the unity team, heavily reworked to fit our needs.

I'm surprised how good we made it look with the Universal Render Pipeline. With simple techniques but tuned well and quality assets our look rivals graphics that use much more expensive methods.

Unity Data Oriented Technology Stack reached 1.0 status in the middle of the project, and it's docs were in flux before that, but in the end it was a very good idea to go with it - it gives unparalleled performance, even though it makes development harder.

I did all of the C# programming in the project, static environment asset work, shading and post-effects and current 'level' design, Mike did the project management, look-dev, some shader work, and Pietro did the flora and fauna assets and the fauna vertex animation graphs.

github.com/godotengine/...

Ok, I found my problem. You can't have those nested. The nested ones will show as white rectangles

Control does inherit from CanvasItem though, so maybe I ran into a bug since I'm on 4.4 dev 5...