PMREMGenerator.fromScene() alters background color

In PMREMGenerator.fromScene( scene ), scene.background is changed and not restored.

In webgl_materials_car.html, do this:

scene = new THREE.Scene();
scene.background = new THREE.Color( 0x0000ff );

scene.environment = pmremGenerator.fromScene( scene ).texture;
console.log( scene.background ); // null

Also,

renderer.setClearColor( 0x0000ff, 1 );

has different behavior. I would have expected them to be equivalent.

three.js r131

[Mugen87]

For simplicity, maybe consider only linear and sRGB,

That sounds like a good start!

[WestLangley]

@WestLangley said

Renderer clear color is neither tone-mapped nor output-encoded, so it is assumed to be in whatever colorspace the renderer renders to – but that is not necessarily sRGB.

I suggest that PMREMGenerator check renderer.outputEncoding to determine what colorspace the clear color is in – and not assume it is in sRGB. (For simplicity, maybe consider only linear and sRGB, although that would not be completely correct.)