Per entity texture modifications

[JMS55]

What problem does this solve or what need does it fill?

Currently, there's no easy way to set the opacity of one entity's sprite.

What alternative(s) have you considered?

Modifying the texture directly would modify it for all entities sharing that texture.

[VVishion]

Possibly related to #64?
Sorry, if drawing this relation by this comment is unnecessary or they are unrelated.

[mockersf]

Entities that share the same handle for a component will all link to the same data underneath, that's the point of handles...

It could be a nice addition to be able to duplicate an handle and get a new handle pointing to the cloned data.

[cart]

Specifically for sprites we have been discussing removing materials and just directly exposing "color" and "texture handle" on the sprite type (or bundle). Not quite sure what we'll land on yet, but I do agree that in the case of sprites, the material abstraction might not be worth it. Currently the new pipelined-rendering branch doesn't use materials for sprites, but I haven't made up my mind yet :)
Curious to hear what everyone else thinks. Godot does "both". Every sprite has a local "color modulation" and "texture handle" value. They can also optionally define "canvas item materials", which can define the color.

[nickfla1]

I think that the ability to individually set the color or, at least, the alpha component of a sprite without continuously creating new handles would be a really nice addition!

[rparrett]

Sprites can now be tinted!

https://github.com/bevyengine/bevy/blob/latest/examples/2d/transparency_2d.rs