Switch from v150 to v156 everything went dark!

[PavelBoytchev]

The intensities for ambient, hemisphere, directional lights and light maps can be restored by multiplying PI with the existing light intensity values.

More details here:

Updates to lighting in three.js r155

The upcoming release r155 will contain a major change in context of lighting. The legacy lighting mode will be disabled by default which affects all light intensities and how point and spot lights decay. What does that mean for me? The release changes the default of WebGLRenderer.useLegacyLights from true to false and also deprecates the property. Meaning it will be eventually removed from the engine with r165. Setting WebGLRenderer.useLegacyLights to false is one important prerequisite for a…