Issue with Transparency on Gifs

[Vesrimm]

I am attempting to create an animated sprite for my friend; one that uses transparency in one of the layers.

This is the sprite normally, when it's not a gif. The flame is fine.
But when I turn it into a animated gif

The flame (and my signature) completely disappears.

I'd appreciate some help on this; (as the transparency issue appeared on another one of my sprites as well)

Thank you.

Aseprite and System version

• Aseprite version: v1.1.13, Steam
• System: Windows 10

[Scrxtchy]

gifs don't have support for rgba values
you get up to 256 rgb colours, and you can use one of those a single transparency value

This is what it looks like in Photoshop's exporter, which should hopefully visualise this for you

[Gasparoken]

@Scrxtchy you are right. Aseprite takes a simple choice to determine if a color should be rendered as transparent or opaque:
If alpha < 128 ? then the pixel color is assumed transparent;
else: the pixel is opaque.
Maybe some alternative can be added:

• Is alpha > configurable threshold ? then a color is assumed opaque.
• Dithering between mask and an opaque colors to simulate colors with alpha < 255 (but maybe is too much).