Consider tracking which effect cannot be rendered and emit one-shot warning

[djeedai]

Describe the solution you'd like

Consider tracking which particle effect instance exists but is skipped for various reasons, e.g. a texture asset is not loaded, and emit a one-shot warning when this happens. This would help debugging why an effect doesn't render.

Describe why you want that solution. Is this related to a problem?

There's been a few bugs where effects don't render. It's hard to tell why from bug reports without more information.

Describe alternatives you've considered

Full featured debug API with recording of commands on CPU and GPU etc. but that's a lot more work.