Set light intensity so that a mesh will always get the same amount of light, regardless of light's distance

[rainerpl]

Hi,

I have a scene where a mesh has a light 10 units away from it with intensity of 1.
Id like to know a formula/way of setting lights intensity to such a value, that when it is moved to 
20 units away from the mesh, it would still light the mesh as intensely as before.

Simply doubling the intensity value doesnt work.

[Convergence]

I don't believe lights in babylon attenuate, so this already happens by default.

[rainerpl]

I think it depends on the range and radius attributes. 
It does attenuate once distance is greater than range, but it seems up to that point...it remains constant

[aWeirdo]

@rainerpl It highly depends on the type of light

And please create a PG; http://www.babylonjs-playground.com/

[GameMonetize]

For point light or spot lights, here is the formula:

https://github.com/BabylonJS/Babylon.js/blob/master/src/Shaders/ShadersInclude/lightsFragmentFunctions.fx#L19

To avoid the attenuation just set light.range to number.MAXVALUE

[rainerpl]

Thanks for the replies.
I was using point lights, and i was using a custom range, so light would attenuate and help to create more depth perception. 
Now im thinking of creating extra lights, 1 set with no attenuation, to consistently light the player, and other lights to light the scene.

I read somewhere that its not recommended to use more than 8 lights or something.
Is it better for performance if i use e.g 
5 lights with  includedOnlyMeshes array containing only 1 mesh, and then another 5 which apply to all meshes. ?

 

[GameMonetize]

The advice is to keep the number of light per mesh to the minimal value.

So your suggestion is fine to me as you won't have more than 6 lights per object