mapping -- Can be an instance of [page:UVMapping THREE.UVMapping], [page:CubeReflectionMapping THREE.CubeReflectionMapping] or [page:SphericalReflectionMapping THREE.SphericalReflectionMapping]. Describes how the image is applied to the object.<br/>Use undefined instead of null as a default value. See mapping property of [page:Texture texture] for more details. <br/>
onLoad -- callback function<br/>
onError -- callback function
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A helper function to generates a [page:Texture THREE.Texture] from an image URL. Provides a load and error