Used by the [page:CubeCamera] as its [page:WebGLRenderTarget].
See [page:CubeCamera] for examples.
[page:Float size] - the size, in pixels.
options - (optional) object that holds texture parameters for an auto-generated target texture and depthBuffer/stencilBuffer booleans. For an explanation of the texture parameters see [page:Texture Texture]. The following are valid options:
[page:Constant wrapS] - default is [page:Textures ClampToEdgeWrapping].
[page:Constant wrapT] - default is [page:Textures ClampToEdgeWrapping].
[page:Constant magFilter] - default is [page:Textures .LinearFilter].
[page:Constant minFilter] - default is [page:Textures LinearFilter].
[page:Constant format] - default is [page:Textures RGBAFormat].
[page:Constant type] - default is [page:Textures UnsignedByteType].
[page:Number anisotropy] - default is *1*. See [page:Texture.anistropy]
[page:Constant encoding] - default is [page:Textures LinearEncoding].
[page:Boolean depthBuffer] - default is *true*. Set this to false if you don't need it.
[page:Boolean stencilBuffer] - default is *false*. Set this to true if you need it.
Creates a new [name]
[page:WebGLRenderer renderer] — the renderer.
[page:Texture texture] — the equirectangular texture.
Use this method if you want to convert an equirectangular panorama to the cubemap format.
Call this to clear the renderTarget's color, depth, and/or stencil buffers. The color buffer is set to the renderer's current clear color. Arguments default to *true*.