[name]

This class generates a Prefiltered, Mipmapped Radiance Environment Map (PMREM) from a cubeMap environment texture. This allows different levels of blur to be quickly accessed based on material roughness. Unlike a traditional mipmap chain, it only goes down to the LOD_MIN level (above), and then creates extra even more filtered 'mips' at the same LOD_MIN resolution, associated with higher roughness levels. In this way we maintain resolution to smoothly interpolate diffuse lighting while limiting sampling computation.

Note: The minimum [page:MeshStandardMaterial]'s roughness depends on the size of the provided texture. If your render has small dimensions or the shiny parts have a lot of curvature, you may still be able to get away with a smaller texture size.

Constructor

[name]( [param:WebGLRenderer renderer] )

This constructor creates a new [name].

Methods

[method:WebGLRenderTarget fromScene]( [param:Scene scene], [param:Number sigma], [param:Number near], [param:Number far], [param:Object options] )

[page:Scene scene] - The given scene.
[page:Number sigma] - (optional) Specifies a blur radius in radians to be applied to the scene before PMREM generation. Default is `0`.
[page:Number near] - (optional) The near plane value. Default is `0.1`.
[page:Number far] - (optional) The far plane value. Default is `100`.
[page:Object options] - (optional) The configuration options. It allows to define the `size` of the PMREM as a number well as the `position` of the internal cube camera as an instance of `Vector3`.

Generates a PMREM from a supplied Scene, which can be faster than using an image if networking bandwidth is low. Optional near and far planes ensure the scene is rendered in its entirety.

[method:WebGLRenderTarget fromEquirectangular]( [param:Texture equirectangular] )

[page:Texture equirectangular] - The equirectangular texture.

Generates a PMREM from an equirectangular texture.

[method:WebGLRenderTarget fromCubemap]( [param:CubeTexture cubemap] )

[page:CubeTexture cubemap] - The cubemap texture.

Generates a PMREM from an cubemap texture.

[method:undefined compileCubemapShader]()

Pre-compiles the cubemap shader. You can get faster start-up by invoking this method during your texture's network fetch for increased concurrency.

[method:undefined compileEquirectangularShader]()

Pre-compiles the equirectangular shader. You can get faster start-up by invoking this method during your texture's network fetch for increased concurrency.

[method:undefined dispose]()

Frees the GPU-related resources allocated by this instance. Call this method whenever this instance is no longer used in your app.

Source

[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]