Sprite Attacher Material Problem

isjhar

Hello every one,

I am trying to use sprite attacher feature in unity. i use it to change weapon which does exist in the character. the problem is when i attach my sprite to sprite attacher, some of the asset's background doesn't look transparent. :think:

the character looks like this.

this is my assets :
Sprites.rar

can anyone tell me what happened here?

isjhar

Pharan

Is there something special about the sprites you are using? Are they auto-generated? Using a special format?

One thing the SpriteAttacher does is automatically (attempt) to process the texture so it matches the requirements of the Spine/Skeleton shader: Premultiply Alpha
But if for some reason it can't do that, you may get some weird results like this. I'll apply a patch so it actually notifies the user, but I'd be curious to know exactly what would cause such a thing.

isjhar

i dont know if my sprites have something special. i get these from my artist. she said, she export these from photoshop.
i have read the article about premultiply alpha. so i do some experiment. i try to use SkeletonGraphic (Premultiply Alpha) shader.

the result is good.

can i say that Skeleton shader render in premultiply alpha and SkeletonGraphic (Premultiply Alpha) shader render in straight alpha?

Pharan

Spine/Skeleton is premultiply alpha
Spine/SkeletonGraphic is also premultiply alpha.

I think I've found the source of your problem.
When you need to use sprites in SpriteAttacher and need premultiply alpha, you need to enable read/write in the texture properties:

We'll add some messages to warn the user about this properly.