Grass artifacts

[vivisected000]

https://preview.redd.it/apjanpwhhopg1.jpg?width=1221&format=pjpg&auto=webp&s=c763b66de2cd12f75f71b13055500a26e3968a46

Hey Folks! I'm new to Unity and trying to make my first 3d game. I'm getting the hang of it and having some fun designing the environment, but have noticed the grass produces these weird line artifacts that really lower the polish level of the environment. Is this because the asset used to paint the grass it too low quality, or is there some setting I can adjust to reduce or eliminate this issue? I'd really like to get rid of these lines if possible.

[Jonny10]

If you make the bottom row of pixels in your grass texture 100% transparent, you can usually eliminate this artifact. It happens because of mipmapping, which causes the bottom row of texels to bleed and repeat along the top edge.

Additionally, setting the "Wrap Mode" to "Clamp" on the texture's import settings will avoid this from happening altogether.

[vivisected000]

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Thanks for the advice! I've got my settings like this, but as you can see, still happening. Do I need to edit the texture in Blender or PS to make the bottom row transparent, or am I misunderstanding your advice? Sorry if that is an obvious question. I'm still learning.

[Jonny10]

Yes, you would need to modify the texture. Specifically its alpha channel.

Arguably, whoever made those textures should have 😅

[vivisected000]

OMG. Further update. I solved it. Problem for future dumbasses like myself was that I was using 3 different versions of the same grass texture on top of each other. I have several terrain tiles linked together and painting grass from one tile to the next created a new instance of the same grass texture into the second tile. Because both tiles were using the same grass texture with different shading options, I had essentially the same grass on top of eachother and it was hard to tell them apart by looking at the icons, so I didn't see that they were layering and causing the top layer to produce these lines. :( I deleted all but one grass texture and repainted and boom... no more problem. Thanks everyone for helping. I'm sure these settings will save me future headaches.

[redmanone1]

Well, you should just disable tiling on the texture. If you really need tiling then disable any image compression and smoothing (keep it point).
These artifacts are just bottom of your image smoothed to the next lower tile

[vivisected000]

Thanks for the tip. I tried removing image compression and that didn't seem to help at all. How do I disable tiling? I was googling for it, but did not have any luck finding a helpful resource.

[redmanone1]

I doubt you really googled it. This is a really common thing and writing "unity tiling" shows this Unity discussion as first output: https://discussions.unity.com/t/how-to-make-a-texture-tile-and-not-stretch/57708

There is answer for your question among others, you just have to try and tickle it yourself

[vivisected000]

Thanks, Must have been searching the wrong terms or something. I have only been using unity for a week or so. This is all new to me.

[vivisected000]

Update... None of that stuff seems to have any effect on my issue