Black lines around the sprite

[jeedee]

Could be avoided if no pixel was touching the edge of the UV square but ex2D seems to be trimming transparency. Add an option for padding inside the uv square?

[jwu]

Hi jeedee,

ex2D will trim out zero alpha pixel when texture import to atlas. I'm sorry but can you explain more about the solution you proposed? Thanks in advance.

[jeedee]

Hello!

When the UV edges are next to the last pixel of the image it causes the black bar problem (Which can be fixed by setting the texture to "Point" but it does not always yield the results wanted on the picture). It would be nice to be able to add "inner" padding to the sprite.

[jwu]

Hi jeedee,

This is a good idea. My question is, where will this "inner" padding option exists? Will it be part of the atlas settings or just in the exSprite inspector in each sprite instance?

In my experience, I think the setting is relate with the texture you import. But if I put it in the atlas panel, then all the texture will affect by this "inner" padding, which in-fact is no necessary for other texture isn't it?

[jeedee]

I think all sprites can benefit from this change, I would maybe make it optional in the atlas import with 0 inner padding by default? I think project-wide you either want it or don't want it so making it per sprite would be a bit tedious

[jwu]

I agree with you.

So before I do this, would you mind to send me some texture or maybe a sample project that including the black line issue. Then I can see if my changes fix it.

[tmsjustinb]

Hey, I'm currently having the same problem... I'm curious if this feature will ever be added? I've looked into Unitile and they have a padding option however, it doesn't have any animation options... Basically it occurs when trying to put to sprites together to make a seemless wall or something. Similar to tilemapping but just doing it by hand using V snapping. The black edge is from using an atlas, which creates a new transparency for the sprites. I'm still pretty new to unity, I know if I just using tiling without putting the sprite in an atlas would deal with the issue but I don't want to have extra draw calls...

[tmsjustinb]

Well, I did figure out a work around. You can give your atlas enough padding for you to bring it into photoshop after it's set up. You can then just ad a layer underneath and fill in a pixel or two of the edges where you are getting black lines. You may have to back this up, because I think if you edit it in the atlas editor it might mess things up on you.

[jwu]

Hi tmsjustinb,

This problem have been fixed in ex2D v1.2.6. We've introduce new algorithm which will bleed the pixel at the edge of the sprite.

[tmsjustinb]

Oh, weird, the store is only saying 1.2.5 is available for me... Is it available already or are you guys still working on it?

[jwu]

Hi tmsjustinb,

Yes, the v1.2.6 is still under beta test. You can ask me the latest beta version through E-Mail.

[jwu]

The problem is caused by several things: filter mode, The padding pixel in atlas, the filling pixel for raw texture to atlas.

In ex2D v1.2.7+, we introduce padding bleed and contour bleed. I move the code to ex2D v2.0 and make them works correctly for rotated texture and atlas fonts. Right now the black line problem solved in v2.0. I'm still testing it with pixel perfect rendering.

The ex2D v2.0 will released soon, so you can test it after that.