Modify Luminosity of layer?

[Reindeer]

Is there a simple and quick way to alter the luminosity of a layer? Better yet if over time, animated.
I want to bring the luminosity of a background down. So far the only way I've found is to add a solid black vector layer over it and give it a lesser degree of opacity, but I feel I'm missing something. Thanks!

[Víctor Paredes]

Try applying a Blending mode to the layer with the solid black vector.
This tutorial could help you:
https://www.animestudiotutor.com/specia ... g_effects/

Also you can use Google to search posts of the forum. Just add "site:lostmarble.com" to your search:
https://www.google.com/search?btnG=1&pw ... gws_rd=ssl
There are many threads about it, sadly many of them are old and the images linked don't work anymore. Anyway, there are some good info and tips on them.

[Reindeer]

Thank you Victor! I'll download and study them, but at a glance they seem to be the answer. Great!