Mipmapping Control

papalagi

I'm working on a project where texture crispiness is important,

I find Godot mipmapping a bit to aggressive on mobile/vulkan

Is there a way to control mipmapping levels?

xyz

papalagi You can use textureLod() instead of texture() when sampling in shaders. It lets you specify the mip level as an argument. For standard materials you can set filtering type in sampling options, which include toggling mipmaps or using anisotropic sampling. I don't know is there's a way to control bias per material/shader.

Can you show what specifically is bothering you?

papalagi

This section of Project Settings doesn't seem to be very effective...

papalagi

xyz

Of course, i'm marking the places where textures get too fast too blurry.

xyz

papalagi Of course, i'm marking the places where textures get too fast too blurry.

Even with anisotropic mipmap filtering?

Btw this image looks fine to me, but I prefer details to go away with distance. Godot probably doesn't do anything special about mipmaps. It just lets the default level be chosen by the GPU driver.

As I said, you can make custom shaders that sample using textureLod() and implement your criteria for choosing a mip level. It's typically done by determining inter-pixel gradients using "magical" functions dFdx() and dFdy(). Take a look here for details. It's glsl but it's directly applicable to Godot's shading language as it's basically an extended version of glsl.

papalagi

xyz

I don't see much improvement with Anisotropic Filt Level 16x

Unfortunately I'm no coder, improved the situation by rising the texture contrast, it works acceptably

thank you!

papalagi

The parameter that improved my mipmaps at the end is in the Standard Shader:

xyz

I suggested anisotropic mipmap filtering in the above post from 8 days ago 😉

papalagi

xyz

You're perfectly right, i was looking for a project wide solution messing with project settings, but i had to adjust it per shader.