Examples: Improved lighting in LDrawLoader example

[mrdoob]

Related issue: #22181

Description

Enabled ACESFilmicToneMapping and increased IBL brightness.

before	after

/cc @gkjohnson

[WestLangley]

It looks over-bright, and there is no way to control the environment intensity of "room environment".

Also, AcesFilmicTonemapping hue-shifts. The rendered colors should look like the CSS Lego colors. If it looks washed out, then you need to find another solution.

https://www.ldraw.org/article/547

[WestLangley]

With this PR.

LDrawLoader hacked to use MeshBasicMaterial. No tone mapping. Linear output Encoding.

[gkjohnson]

If we continue to use outputEncoding = sRGBEncoding I think we need to convert the LDraw colors to Linear color space.

To @mrdoob's comment (#22181 (comment)):

Shouldn't the loader produce linear colors? What if someone wanted to mix Lego models with GLTF models? 🤔

I wouldn't be against it but I think a number of model loaders I think load material and vertex colors in sRGB because that's how they're stored (PLYLoader, ColladaLoader, etc). But having a consistent color space that models are loaded in to would simplify things. If we change the loaders so colors are consistently loaded in Linear color space then I think the default value for WebGLRenderer.outputEncoding would need to changed to sRGBEncoding.

[WestLangley]

And the loader is setting envMapIntensity to 0.3 for some materials; 1.0 for others. Why?

[gkjohnson]

And the loader is setting envMapIntensity to 0.3 for some materials; 1.0 for others. Why?

Oh yes sorry -- I don't believe there's a good reason. It should be removed so it defaults to 1.0. I think it was a misunderstood / misguided addition on my part. The PEARLESCENT surface finish should also probably be converted to use MeshStandardMaterial, as well.

[mrdoob]

@gkjohnson

I think the default value for WebGLRenderer.outputEncoding would need to changed to sRGBEncoding.

Yes! I want to change that soon. We can try next month?

[gkjohnson]

@mrdoob @WestLangley

Yes! I want to change that soon. We can try next month?

Would that entail converting all the model loaders to produce linear colors rather than sRGB? And I'm not sure if this has been discussed before but have you considered ferrying around the color space in the Color class so the renderer is aware of what the correct conversion should be?

const color = new THREE.Color();
color.set( 0xff0000, sRGBEncoding );
console.log( color.encoding ); // sRGBEncoding

[Mugen87]

Related #19169.