Bitmap sink object. Converts a bitmap into a RenderMan LatLong Environment Map that allows you to use an image for simulating things like reflections with the appropriate shaders, e.g. k3d_shiny, k3d_shiny_metal, etc. Note that this is a "LatLong" map where the image is treated like a "Mercator Projection", and is commonly used with hand-generated maps, video footage, etc.