It's important to understand that in general, textures take width _ height _ 4 / 1.33 bytes of memory.
For setting the filter when the texture is drawn larger than its original size you set texture.magFilterproperty to either:
- THREE.NearestFilter
- pick the closet single pixel from the original texture. With a low resolution texture this gives you a very pixelated look like Minecraft.
- THREE.LinearFilter
- pick the 4 pixels from the texture that are closest to the where we should be choosing a color from and blend them in the appropriate proportions relative to how far away the actual point is from each of the 4 pixels.
For setting the filter when the texture is drawn smaller than its original size you set the texture.minFilterproperty to one of 6 values:
- THREE.NearestFilter
- same as above, choose the closest pixel in the texture
- this flickers in the distance because the GPU is picking pixels from the original texture
- THREE.LinearFilter
- same as above, choose 4 pixels from the texture and blend them
- this flickers in the distance because the GPU is picking pixels from the original texture
- THREE.NearestMipmapNearestFilter
- choose the appropriate mip then choose one pixel
- THREE.NearestMipmapLinearFilter
- choose 2 mips, choose one pixel from each, blend the 2 pixels
- THREE.LinearMipmapNearestFilter
- chose the appropriate mip then choose 4 pixels and blend them
- THREE.LinearMipmapLinearFilter
- choose 2 mips, choose 4 pixels from each and blend all 8 into 1 pixel
- smoothest, highest quality (of course with the trade-off of performance, especially on mobile)