HemisphereLight direction uniform

We are using a HemisphereLight.position property to define a direction to HemisphereLight normals, but that doesn’t seem entirely appropriate to me, since it’s an angle, and angle is .rotation/.euler.

I think that we could use .getWorldDirection() instead of .position?

Can I start like this on WebGPU?

WebGL Code: https://github.com/mrdoob/three.js/blob/8db7a598ed6e71538e286e5c56c02cc5823157dc/src/renderers/webgl/WebGLLights.js#L530-L532

[WestLangley]

This line is redundant.

uniforms.direction.normalize(); 

[Mugen87]

It was previously discussed to remove the target property and orient directional and spot lights as you would expect. There is an existing PR but I’ve lately implemented this feature by myself to better understand the change: https://github.com/Mugen87/three.js/commit/a2a8005d18012f90929060ddd9d5b288c4e6da60

Unfortunately, such a change will noticeably impact user code. You can easily see this at the number of examples that break which the PR. There are also some open points that need to be discussed (like the default orientation of lights). But overall, orienting lights that way is more intuitive. Still, this change is critical regarding backwards compatibility…