Grey border around img when on black background.

[Jeeper]

Anyone else have the issue that whenever you draw a .png on a black background, you get a unwanted grey outline to your picture. Is there some kind of blend setting or AA setting that you can turn of in order to fix this?

[raidho36]

Try putting a black layer underneath your picture in the editor and see if it works.

[Jeeper]

Try putting a black layer underneath your picture in the editor and see if it works.

No issues there, just tried it. :S

I get this issue with pictures from Gimp and PS. But only ingame.

[raidho36]

What exactly the artifact looks like? A halo surrounding the silhouette or thin gray rectangle surrounding the sprite? Be more specific about this please.

[micha]

I had the same issue. The problem is that the transparent background is technically white. What you need is, like raidho said, a black and transparent background.
In inkscape it is possible to set the background to black-transparent. Don't know how to do it in gimp. You can try (for an experiment) to add a background in black, that is almost transparent (transparent sometimes gets removed completely): Set the alpha value to the smallest value larger than zero. That worked for me.

[raidho36]

In GIMP, there's an option to keep transparent pixels' colors. Dunno for PS.

[Jasoco]

Also make sure to draw your image at floored coordinates by using math.floor on its X and Y. See if that helps.

[Germanunkol]

As micha mentioned, in inkscape you can simply use the image preferences to set the background transparency to (0,0,0,0) (instead of (255,255,255,0)

Solution in Gimp (for .png images):

• Open file
• Select color picker tool
• Confirm with color-picker that transparency is (255,255,255,0) (Hold shift while clicking to bring up Color Picker Information Window)
• Make a new layer
• Fill new layer with black and move it to the very bottom
• With the layer selected, go to "Colors"->"Color to Alpha", choose black and confirm
• Merge the two layers ("Layer"->"Merge Down")
• Confirm with color-picker-tool that background color is now (0,0,0,0)
• Victory dance

[Jeeper]

As micha mentioned, in inkscape you can simply use the image preferences to set the background transparency to (0,0,0,0) (instead of (255,255,255,0)

Solution in Gimp (for .png images):

• Open file
• Select color picker tool
• Confirm with color-picker that transparency is (255,255,255,0) (Hold shift while clicking to bring up Color Picker Information Window)
• Make a new layer
• Fill new layer with black and move it to the very bottom
• With the layer selected, go to "Colors"->"Color to Alpha", choose black and confirm
• Merge the two layers ("Layer"->"Merge Down")
• Confirm with color-picker-tool that background color is now (0,0,0,0)
• Victory dance

Thanks a lot! It worked like a charm.