I was playing 
with the project and realized that now when I load an image it is always darkened (as if there is a shadow on it)
if I create a new project, the shadow is also present in the image. please help me 
sorry for my english 
I previously edited the standard effect db://internal/effects/for2d/builtin-sprite.effect and added something like a shadow, after returning to the original code, the shadow disappeared from all images. We live on.
sorry for my english
You might need to display more information, including shader file and node information