GL_EXT_stencil_clear_tag
https://www.khronos.org/registry/OpenGL/extensions/EXT/EXT_stencil_clear_tag.txt
GL_EXT_stencil_clear_tag

	GL_STENCIL_TAG_BITS_EXT 0x88F2
	GL_STENCIL_CLEAR_TAG_VALUE_EXT 0x88F3
