Environment: Windows 7 SP1 QGLInfo: {noformat} QGLFormat::openGLVersionFlags: 1.1 1.2 1.3 1.4 1.5 2.0 2.1 QGLFormat::hasOpenGL: true QGLFormat::hasOpenGLOverlays: false QGLPixelBuffer::hasOpenGLPbuffers: true QGLFramebufferObject::hasOpenGLFramebufferObjects: true QGLFramebufferObject::hasOpenGLFramebufferBlit: true QGLShaderProgram::hasOpenGLShaderPrograms: true OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: Quadro FX 580/PCI/SSE2 OpenGL version string: 2.1.2 OpenGL extensions:     GL_ARB_color_buffer_float GL_ARB_compatibility GL_ARB_copy_buffer     GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture     GL_ARB_draw_buffers GL_ARB_draw_elements_base_vertex     GL_ARB_draw_instanced GL_ARB_fragment_coord_conventions     GL_ARB_fragment_program GL_ARB_fragment_program_shadow     GL_ARB_fragment_shader GL_ARB_framebuffer_object     GL_ARB_framebuffer_sRGB GL_ARB_geometry_shader4     GL_ARB_half_float_pixel GL_ARB_half_float_vertex GL_ARB_imaging     GL_ARB_map_buffer_range GL_ARB_multisample GL_ARB_multitexture     GL_ARB_occlusion_query GL_ARB_pixel_buffer_object     GL_ARB_point_parameters GL_ARB_point_sprite GL_ARB_provoking_vertex     GL_ARB_seamless_cube_map GL_ARB_shader_objects     GL_ARB_shading_language_100 GL_ARB_shadow GL_ARB_sync     GL_ARB_texture_border_clamp GL_ARB_texture_buffer_object     GL_ARB_texture_compression GL_ARB_texture_compression_rgtc     GL_ARB_texture_cube_map GL_ARB_texture_env_add     GL_ARB_texture_env_combine GL_ARB_texture_env_crossbar     GL_ARB_texture_env_dot3 GL_ARB_texture_float     GL_ARB_texture_mirrored_repeat GL_ARB_texture_multisample     GL_ARB_texture_non_power_of_two GL_ARB_texture_rectangle     GL_ARB_texture_rg GL_ARB_transpose_matrix     GL_ARB_uniform_buffer_object GL_ARB_vertex_array_bgra     GL_ARB_vertex_array_object GL_ARB_vertex_buffer_object     GL_ARB_vertex_program GL_ARB_vertex_shader GL_ARB_window_pos     GL_ATI_draw_buffers GL_ATI_texture_float GL_ATI_texture_mirror_once     GL_EXTX_framebuffer_mixed_formats GL_EXT_Cg_shader GL_EXT_abgr     GL_EXT_bgra GL_EXT_bindable_uniform GL_EXT_blend_color     GL_EXT_blend_equation_separate GL_EXT_blend_func_separate     GL_EXT_blend_minmax GL_EXT_blend_subtract     GL_EXT_compiled_vertex_array GL_EXT_depth_bounds_test     GL_EXT_direct_state_access GL_EXT_draw_buffers2 GL_EXT_draw_instanced     GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_framebuffer_blit     GL_EXT_framebuffer_multisample GL_EXT_framebuffer_object     GL_EXT_framebuffer_sRGB GL_EXT_geometry_shader4     GL_EXT_gpu_program_parameters GL_EXT_gpu_shader4     GL_EXT_multi_draw_arrays GL_EXT_packed_depth_stencil     GL_EXT_packed_float GL_EXT_packed_pixels GL_EXT_pixel_buffer_object     GL_EXT_point_parameters GL_EXT_provoking_vertex GL_EXT_rescale_normal     GL_EXT_secondary_color GL_EXT_separate_shader_objects     GL_EXT_separate_specular_color GL_EXT_shadow_funcs     GL_EXT_stencil_two_side GL_EXT_stencil_wrap GL_EXT_texture3D     GL_EXT_texture_array GL_EXT_texture_buffer_object     GL_EXT_texture_compression_latc GL_EXT_texture_compression_rgtc     GL_EXT_texture_compression_s3tc GL_EXT_texture_cube_map     GL_EXT_texture_edge_clamp GL_EXT_texture_env_add     GL_EXT_texture_env_combine GL_EXT_texture_env_dot3     GL_EXT_texture_filter_anisotropic GL_EXT_texture_integer     GL_EXT_texture_lod GL_EXT_texture_lod_bias     GL_EXT_texture_mirror_clamp GL_EXT_texture_object GL_EXT_texture_sRGB     GL_EXT_texture_shared_exponent GL_EXT_texture_swizzle     GL_EXT_timer_query GL_EXT_vertex_array GL_EXT_vertex_array_bgra     GL_IBM_rasterpos_clip GL_IBM_texture_mirrored_repeat     GL_KTX_buffer_region GL_NVX_conditional_render GL_NV_blend_square     GL_NV_conditional_render GL_NV_copy_depth_to_color GL_NV_copy_image     GL_NV_depth_buffer_float GL_NV_depth_clamp GL_NV_explicit_multisample     GL_NV_fence GL_NV_float_buffer GL_NV_fog_distance     GL_NV_fragment_program GL_NV_fragment_program2     GL_NV_fragment_program_option GL_NV_framebuffer_multisample_coverage     GL_NV_geometry_shader4 GL_NV_gpu_program4 GL_NV_half_float     GL_NV_light_max_exponent GL_NV_multisample_coverage     GL_NV_multisample_filter_hint GL_NV_occlusion_query     GL_NV_packed_depth_stencil GL_NV_parameter_buffer_object     GL_NV_parameter_buffer_object2 GL_NV_pixel_data_range     GL_NV_point_sprite GL_NV_primitive_restart GL_NV_register_combiners     GL_NV_register_combiners2 GL_NV_shader_buffer_load     GL_NV_texgen_reflection GL_NV_texture_barrier     GL_NV_texture_compression_vtc GL_NV_texture_env_combine4     GL_NV_texture_expand_normal GL_NV_texture_rectangle     GL_NV_texture_shader GL_NV_texture_shader2 GL_NV_texture_shader3     GL_NV_transform_feedback GL_NV_vertex_array_range     GL_NV_vertex_array_range2 GL_NV_vertex_buffer_unified_memory     GL_NV_vertex_program GL_NV_vertex_program1_1 GL_NV_vertex_program2     GL_NV_vertex_program2_option GL_NV_vertex_program3 GL_S3_s3tc     GL_SGIS_generate_mipmap GL_SGIS_texture_lod GL_SGIX_depth_texture     GL_SGIX_shadow GL_SUN_slice_accum GL_WIN_swap_hint     WGL_EXT_swap_control {noformat}