Can anyone see whats wrong with this snippet?

CoronaRenderer.adaptivity_targetError = 3.0

I cant find anything in the docs to suggest this isn’t being used in the right way?

You are trying to use the class itself. You need a/the instance of Corona. You can get it by “renderers.current”, so the line would be:

renderers.current.adaptivity_targetError=3

Good Luck

Perfect thank you!