Bunch of internal lisps generating all kinds of shader code (or OpenCL in at least one case), plus things like CEPL (which also generates shaders from CL data/c

Bunch of internal lisps generating all kinds of shader code (or OpenCL in at least one case), plus things like CEPL (which also generates shaders from CL data/code) and Shinmera uses in his game engine automatic composition of shaders using CLOS metaobjects, iirc