Text: error using postprocessing with an outline present

[lojjic]

Issue demonstrated at: https://codesandbox.io/s/selective-bloom-forked-chd9ff?file=/src/App.js

When using the postprocessing library with the material override workaround in place, it tries to set .material to the value of .material. Since Text has a custom getter for .material that returns an array of two materials when a text outline is present, this ends up trying to set .material to that array, and the code does not account for that case.

Possible fix: in the .material setter, check whether it's an array and if so extract the base material out of it.

[jackletter]

same issue