SpatialMaterial transparency issue

Niiclas

Hi guys,

I have a problem with a 3D MeshInstance, where the texture does not get completely transparent. When I enable the transparency on the SpatialMaterial of the MeshInstance, which also has a basic grass texture on the albedo texture, it still has some green lines at the border, which are also visible through the camera. Does anyone know how to remove them?

The MeshInstance without transparency on the SpatialMaterial:

The MeshInstance with transparency on the SpatialMaterial:

Bimbam

I think they are also there without the transparency enabled which leads me to think they may be in the texture itself (compression artifact perhaps?

I would double-check the texture, but also you could try using alpha clip to clean up the edges.

Niiclas

You're right, the lines are still there, even if the transparency is disabled. I tried to create a new texture and imported it in to Godot, but the problem was still there.

Then I finally found the problem, which caused the lines to appear. The repeat flag in the import settings was set to "Enabled". I just set Import -> Flags -> Repeat to "Disabled" and the problem is gone.

Thanks for helping!

Megalomaniak

Yep, it's the combination of mip-mapping(which causes the blurring of texel samples) and texture coordinate repetition that produces the color from the bottom of the texture to bleed into the top fragments.

Alternative solution if you need the repeat and mip-mapping to be enabled is to leave some blank/transparent alpha mapped pixels at the edges of the texture and to map your texture so the edges are left out of mapping range.