2806d54320
These attributes are not guaranteed to exist. So they should either be used conditionally, or with a fallback value. The fallback value for the opacity is obvious, but for the radius it's more tricky. There is not a consistent fallback value across Blender unfortunately. The one I used here is used in a couple of places. Pull Request: https://projects.blender.org/blender/blender/pulls/128847
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