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Not even OpenGL ES, since PSGL did not support the OpenGL shader language, using Cg for shaders instead.

• SXX 11y ago
  Just checked documentation. Actually it is OpenGL ES, but based on OpenGL ES 1.0 that doesn't really have any shader support. So it's GLES 1.0 + some 1.1 features + more additions.
  • lsaferite 11y ago
    Is there any wonder that it wasn't widely used then?