Sky/SkyMesh: Remove legacy gamma correction curve.

[mrdoob]

Related issue: #32325

Description

Removed the adaptive gamma curve that was applied before tonemapping. The shaders now output linear values, letting the renderer's tonemapping and color space conversion handle the display transform correctly.

This curve was a legacy artifact from before Three.js had proper color management. Applying it before tonemapping meant the tonemapper was operating on non-linear data.

(Made with Claude Opus 4.5)

[kungfooman]

Suddenly my sky looks like doomsday and I can't figure out options for a normal "daylight" sky.

I also tried to increase like renderer.toneMappingExposure = 2 (but it just makes everything look grayed out somehow)

Any solution for nice daylight sky?

[Mugen87]

Maybe like so: https://jsfiddle.net/zxr2c4dv/

If you want the sky a bit more blue, reduce the rayleigh parameter e.g. to 0.5.

[kungfooman]

Thank you @Mugen87 great example, I didn't even know the clouds can be animated ☁️ 🌈

Sadly it still looks like doomsday:

Previous sky was looking like "clear bright day"

I think you are changing as we write, now it is suddenly full white:

Thank you for working on it!

[Mugen87]

Please try the link again and also us the controls to look around. I have not saved the fiddle correctly when posted the comment.

[kungfooman]

Thank you @Mugen87 I just still have a big problem with it. This is how it looked before:

As you can see, the camera is "above" sea level and you can still see the grid very clearly.

In your jsfiddle I have to drag the orbit camera below sea level, otherwise it's basically just full bright and you won't see the grid:

I always loved the Three sky because it looked so serene with soft pastell gradients and now it just looks like doomsday or "too bright".

[Mugen87]

The removal of the previous built-in gamma correction has significantly changed the effect's visual. If you are not able to restore a similar look via the parameters, I'm afraid you have to use a custom version of the previous implementation.