scene.environmentBRDFTexture vs scene.environmentTexture

Questions
9

I already add an env texture like this at the begining after I created the scene.

    const envTexture = CubeTexture.CreateFromPrefilteredData('https://preview.smarteam3d.com/build/environment.dds', scene);
    envTexture.name = "envTex";
    envTexture.gammaSpace = false;
    scene.environmentTexture = envTexture;

and put a return at the begining of function GetEnvironmentBRDFTexture. Aaaand all good
Because of this I asked if I still have to set environmentBRDFTexture too.
So shall I add it like this

scene.environmentBRDFTexture = CubeTexture.CreateFromPrefilteredData('https://preview.smarteam3d.com/build/environment.dds', scene);

?