Sets environment properties for the entire scene The [code]WorldEnvironment[/code] node can be added to a scene in order to set default [Environment] variables for the scene. The [code]WorldEnvironment[/code] can be overridden by an [Environment] node set on the current [Camera]. Additionally, only one [code]WorldEnvironment[/code] may be instanced in a given scene at a time. The [code]WorldEnvironment[/code] allows the user to specify default lighting parameters (e.g. ambient lighting), various post-processing effects (e.g. SSAO, DOF, Tonemapping), and how to draw the background (e.g. solid color, skybox).