Minecraft Forums

Mipmapping:


In 3D computer graphics, mipmaps (also MIP maps) are pre-calculated, optimized sequence of textures that accompany a main texture, each of which is a progressively lower resolution representation of the same image.

Issue: When playing Minecraft with any setting of mipmapping other than off, spruce leaves change colour unintentionally. This leads to visual distortion in spruce forests. The unaffected area seems to be within a small spherical radius around the player. Leaves in the distance will change colour. Hovering above a forest at a certain height, leaves will also change colour under the player.

http://i.imgur.com/Y1rm3SG.png
full size image^

Is there any resolution to this without having to turn mipmapping completely off?

Id start by looking at the texture sheets the game creates for the mipmapping. Its likely the texture is being compressed to a point where only a light color green is mostly visible.

Here are the 4 levels of MIP map sheets excluding the full resolution for copyright issues. Spruce leaves like the rest of the leaves uses a grey scale texture with a colour map applied to it. Wouldn't the colour loss compression affect all my leaves then?

Well if you notice it doesnt only effect distant leaves, but also those at extreme angles closer to the camera. Which is why I thought it has to do with the mipmap textures.



It looks like your leaves use a bit of actual green? Perhaps it is blending this into the texture as it downscales?

Issue resolved: Different grey colours were chosen and texture was slightly modified. Spruce leaves no longer change colour at a distance.

http://i.imgur.com/6dLniG1.png

out of curiosity, what exactly did you change?

Quote from echonite»

out of curiosity, what exactly did you change?

Not sure how this fixed it. But it no longer changes colours at distance from dark to light. Foliage colour map is a single colour. Grass colour map has changed since that old screenshot.