Hey guys! I posted on my website a mechanic that can serve to be studied. There I show you how to erase an image in the style of the DOP2 game (the one of finding hidden objects).
The website is in Portuguese but there is a translator in the bottom left corner. Thank you see you later!
Acess tutorial here (there is also the project folder): https://www.centroindie.com/2021/04/gdevelop-apagar-imagem-como-borracha.html