GL_NV_depth_buffer_float http://developer.download.nvidia.com/opengl/specs/GL_NV_depth_buffer_float.txt GL_NV_depth_buffer_float GL_DEPTH_COMPONENT32F_NV 0x8DAB GL_DEPTH32F_STENCIL8_NV 0x8DAC GL_FLOAT_32_UNSIGNED_INT_24_8_REV_NV 0x8DAD GL_DEPTH_BUFFER_FLOAT_MODE_NV 0x8DAF void glDepthRangedNV (GLdouble zNear, GLdouble zFar) void glClearDepthdNV (GLdouble depth) void glDepthBoundsdNV (GLdouble zmin, GLdouble zmax)