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glGetTexParameter and its by-name form rejected several parameters GL 4.6 core table 8.20 lists, with INVALID_ENUM as if the application had made them up. GL_DEPTH_STENCIL_TEXTURE_MODE was the worst of them: the float setter accepted it, validated it and then threw the value away, the integer setter did not accept it at all, and neither getter could report it - so the mode could be set and never read back, and setting it through glTextureParameteri was an error. It is real state now, defaulting to DEPTH_COMPONENT, set by both setters and readable from both getters. GL_TEXTURE_LOD_BIAS was in the same position: settable, not gettable. The by-name getters reach the target-based ones through a temporary binding rather than the per-object path, so both had to learn these; the per-object path gained the swizzle components, the target, the image format compatibility type and the texture-view parameters at the same time, since they were missing there for the same reason. direct_state_access.textures_get_set_parameter passes on both backends, and textures_defaults stops raising an internal error and reports an ordinary failure it can be diagnosed from.