…light, so we can simulate a sun cyclus. -Set Blendfunc back to Simpleblenfunc in render, so lights rendered after the origin won't be affected by dynamicshadow blending in PositionalLight and Directionallight.

…r height calculation.

…w directly down on the field. Just add to the LightData the shadow=true attribute and the box2d-body will become a shadow. Only works for chain and polygon shape now.