PNG alpha texture glitch?

Hello.
I'm using sprites with PNG textures with alpha channel and once in a while I'm getting small black likes on the edges of the sprite...
Is it my software (PaintShopPro 8.10), blitz3d or my graphics driver?
Anyone had similar problems?

Flimmering?
That could be Z-ordering Issues...
discribe it more clearly

No I have had this too,

Transparent pngs when used as sprites sometimes show edges. Try using a power of 2 size I think that might be
part of the problem.

so

64 x 64
128 x 128
256 x 128

you know the drill.


IPete2.

No, that's not working...
i can't remember sprites doing that if they are just transparent pngs... Only if I use alpha-transparrency... Hmmm...

Anatoly,

I'll go and check out a recently revived project of mine. It too was suffering from a problem of strange edges appearing where there was nothing.

I did fix it so I'll check out how.

In the meantiume is there anyway you can use a masked version instead?

IPete2.

I guess I can, sprites will have more sharper edges, but it's alright - even though my game has lots of them and they are huge! ;-)

Sounds like fringing to me. What does your color channel look like?

For example, if you wanted a green circle, the alpha channel would be black with a white circle, and the color channels would be solid green. If you have a green circle with black around it in your color channel, that black is getting pulled in by the filtering and showing up, creating a fringe.

Make sense?

I agree with pongo. Use a more similar colour for the alphaed areas of the texture.

Clamp the UVs.