Many retro games use flashing sprites to indicate a character taking damage or a change in status.
This is a great trick for visual feedback we can even use nowadays with paper 2D and Unreal Engine 5.
In this tutorial I’ll show how to achieve that through creating a dynamic material!
https://dev.epicgames.com/community/learning/tutorials/Z85B/unreal-engine-paper-2d-sprite-flashing