Support dynamic changes to the layer opacity on tiled maps

[gotnull]

Problem to solve

I would like to be able to modify the layer opacity on a tiled map.

Proposal

Being able to access a layer:

final backgroundOff = game.tileMap.getLayer("Background");

..and set its opacity:

backgroundOff.opacity = 0.5;

More information

No response

Other

• Are you interested in working on a PR for this?