AdvancedOptionalcameraCamera to draw from, or the view's own when omitted; see RenderPassOptions#camera
Opaque colour copy the materials refract, from a CopyOpaquePass: PassContext#opaqueColor for the view's own camera
Opaque depth copy the materials read, from a CopyDepthPass: PassContext#opaqueDepth for the view's own camera
Renderer the pass draws with: the PassContext#renderer a Pass3D#build call receives
Options for constructing a BlendedRefractionPass