GL_ARB_base_instance http://www.opengl.org/registry/specs/ARB/base_instance.txt GL_ARB_base_instance void glDrawArraysInstancedBaseInstance (GLenum mode, GLint first, GLsizei count, GLsizei primcount, GLuint baseinstance) void glDrawElementsInstancedBaseInstance (GLenum mode, GLsizei count, GLenum type, const void* indices, GLsizei primcount, GLuint baseinstance) void glDrawElementsInstancedBaseVertexBaseInstance (GLenum mode, GLsizei count, GLenum type, const void* indices, GLsizei primcount, GLint basevertex, GLuint baseinstance)