Libgdx texture bleeding in tile map

Question

So I am making a game in Libgdx using an isometric tiled map but when I set the texture filtering of the tiles to linear, black lines show up between all the tiles. This is caused because each tile blends with the tiles next to it.

I know many people have asked this before and the common answer seems to be add padding. I have padding but that doesn't help because then the tiles start blending with the clear pixels instead. That just turns the lines a different color.

Another option people say is to copy the pixels on the edge of each tile for padding, but unfortunately that only works for non-isometric maps. However when I use the tilemap preprocessor it works fine even with filtering, but the tilemap preprocessor causes many other issues so I don't want to do that.

How can I fix this? Somehow the tiledmap preprocessor does it fine but I'm not sure what that actually does other than adding padding. Any help is greatly appreciated!

Answer 1

If you're getting transparent edge pixels, it sounds like you haven't enabled duplicatePadding. Just to be sure, these are my recommended TexturePackerSettings:

duplicatePadding = true
paddingX = 2
paddingY = 2

Answer 2

You should check that your spritesheet is power of two.

For example:

3 tiles of 64x64 = one spritesheet of 192x64 ---> wrong

4 tiles of 64x64 = one spritesheet of 256x64 ---> right

Even if each sprite is power of two itself.

I hope this helps you.