I have exactly the same problem.
Migrating the project from 4.8.3 to 4.9, all call to DrawMaterialSimple(), working before, do not draw anymore. In viewport, new viewport or Standalone game.
I have exactly the same problem.
Migrating the project from 4.8.3 to 4.9, all call to DrawMaterialSimple(), working before, do not draw anymore. In viewport, new viewport or Standalone game.