Textures shimmer at a distance

swante

I am making an aviasim and when I fly over terrain I see this shimmering on textures that are far away from camera. Near textures look fine. It's not z-fighting and not texture filtering as far as I can see. What else can cause this effect?

Megalomaniak

mipmapping?

swante

@Megalomaniak You are right, all I needed is to reimport textures with Mipmaps turned on. Wonder why it's not the default. Thanks!

Calinou

Wonder why it's not the default. Thanks!

Mipmapping is enabled by default in textures used in 3D, but not in 2D. If you've used the texture in a 2D context first, it may not be reimported with 3D-friendly flags by default once you start using it in 3D.

This is no longer an issue in Godot 4.0 as texture flags are now set in the location where the texture is used (e.g. a material), rather than in the texture file itself.

swante

@Calinou Nope, I import them directly into 3D scene but they have Mipmaps flag turned off by default. Maybe because they are in JPEG format.

Calinou

Maybe because they are in JPEG format.

In my experience, JPEG textures don't cause issues with regards to 3D detection.

Could you upload a minimal reproduction project somewhere?

cybereality

It could be that they are NPOT textures (meaning not 1024x1024 or similar). I think with odd sizes mipmapping doesn't work well or at all.

swante

@cybereality Right, they are not square. But after reimporting with mipmaps and anisotropic flags they look just fine.