Just tested performance of today's FG CVS OSG-based version vs older plib-based one (built from Oct 22 FG CVS) version.
The exciting news: when run at the default mode here (1280x1024, truecolor default visual, but no --bpp on the cmdline), I get a slight (1-2) fps improvement of OSG vs PLIB versions. Tested in KSFO, dawn and noon. Noon is 17-18 vs 19-21 improvement, and dawn is 9-11 to 12-14). Note the reduced LOD ranges (otherwise the machine just crawls, PLIB or OSG). Sources: OSG CVS + the patch from ftp://ftp.uni-duisburg.de/FlightGear/Misc_maf/OpenSceneGraph-20061113/OSG_OP_OT-1.2-Flightgear.diff Machine: Linux mas1125b 2.6.18-1-686 #1 SMP Sat Oct 21 17:21:28 UTC 2006 i686 GNU/Linux Pentium 4 @2.4GHz 512Mb RAM NVIDIA GEFORCE4 MX 440 AGP 8x Full details of the hardware are specified in bugs.debian.org/309607 from glxinfo: name of display: :0.0 display: :0 screen: 0 direct rendering: Yes server glx vendor string: NVIDIA Corporation server glx version string: 1.4 server glx extensions: GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGI_video_sync, GLX_SGI_swap_control client glx vendor string: NVIDIA Corporation client glx version string: 1.4 client glx extensions: GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_import_context, GLX_SGI_video_sync, GLX_NV_swap_group, GLX_NV_video_out, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGI_swap_control, GLX_NV_float_buffer, GLX_ARB_fbconfig_float GLX version: 1.3 GLX extensions: GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGI_video_sync, GLX_SGI_swap_control, GLX_ARB_get_proc_address OpenGL vendor string: NVIDIA Corporation OpenGL renderer string: GeForce4 MX 440 with AGP8X/AGP/SSE2 OpenGL version string: 1.5.6 NVIDIA 87.76 OpenGL extensions: GL_ARB_imaging, GL_ARB_multitexture, GL_ARB_pixel_buffer_object, GL_ARB_point_parameters, GL_ARB_point_sprite, GL_ARB_shader_objects, GL_ARB_shading_language_100, GL_ARB_texture_compression, GL_ARB_texture_cube_map, GL_ARB_texture_env_add, GL_ARB_texture_env_combine, GL_ARB_texture_env_dot3, GL_ARB_texture_mirrored_repeat, GL_ARB_texture_rectangle, GL_ARB_transpose_matrix, GL_ARB_vertex_buffer_object, GL_ARB_vertex_program, GL_ARB_vertex_shader, GL_ARB_window_pos, GL_S3_s3tc, GL_EXT_texture_env_add, GL_EXT_abgr, GL_EXT_bgra, GL_EXT_blend_color, GL_EXT_blend_minmax, GL_EXT_blend_subtract, GL_EXT_clip_volume_hint, GL_EXT_compiled_vertex_array, GL_EXT_Cg_shader, GL_EXT_draw_range_elements, GL_EXT_fog_coord, GL_EXT_multi_draw_arrays, GL_EXT_packed_pixels, GL_EXT_paletted_texture, GL_EXT_pixel_buffer_object, GL_EXT_point_parameters, GL_EXT_rescale_normal, GL_EXT_secondary_color, GL_EXT_separate_specular_color, GL_EXT_shared_texture_palette, GL_EXT_stencil_wrap, GL_EXT_texture_compression_s3tc, GL_EXT_texture_cube_map, GL_EXT_texture_edge_clamp, GL_EXT_texture_env_combine, GL_EXT_texture_env_dot3, GL_EXT_texture_filter_anisotropic, GL_EXT_texture_lod, GL_EXT_texture_lod_bias, GL_EXT_texture_object, GL_EXT_vertex_array, GL_IBM_rasterpos_clip, GL_IBM_texture_mirrored_repeat, GL_KTX_buffer_region, GL_NV_blend_square, GL_NV_fence, GL_NV_fog_distance, GL_NV_gpu_program_parameters, GL_NV_light_max_exponent, GL_NV_packed_depth_stencil, GL_NV_pixel_data_range, GL_NV_point_sprite, GL_NV_register_combiners, GL_NV_texgen_reflection, GL_NV_texture_env_combine4, GL_NV_texture_rectangle, GL_NV_vertex_array_range, GL_NV_vertex_array_range2, GL_NV_vertex_program, GL_NV_vertex_program1_1, GL_SGIS_generate_mipmap, GL_SGIS_multitexture, GL_SGIS_texture_lod, GL_SUN_slice_accum glu version: 1.3 glu extensions: GLU_EXT_nurbs_tessellator, GLU_EXT_object_space_tess autosave.xml: <PropertyList> <sim> <startup> <save-on-exit>true</save-on-exit> </startup> <sound> <volume type="float">0.349673</volume> <atc-chatter type="bool">false</atc-chatter> </sound> <rendering> <horizon-effect type="bool">true</horizon-effect> <enhanced-lighting type="bool">false</enhanced-lighting> <distance-attenuation type="bool">false</distance-attenuation> <static-lod> <detailed type="string">1000</detailed> <rough type="string">3000</rough> <bare type="string">12000</bare> </static-lod> <random-objects type="bool">true</random-objects> <point-sprites type="bool">true</point-sprites> <precipitation-enable type="bool">true</precipitation-enable> <lightning-enable type="bool">false</lightning-enable> <bump-mapping type="bool">false</bump-mapping> <clouds3d-enable type="bool">false</clouds3d-enable> <clouds3d-vis-range type="float">25000</clouds3d-vis-range> <clouds3d-density type="float">100</clouds3d-density> <clouds3d-cache-size type="int">1024</clouds3d-cache-size> <clouds3d-cache-resolution type="int">0</clouds3d-cache-resolution> <shadows-ac type="bool">false</shadows-ac> <shadows-ac-transp type="bool">false</shadows-ac-transp> <shadows-ai type="bool">false</shadows-ai> <shadows-to type="bool">false</shadows-to> <shadows-debug type="bool">false</shadows-debug> <fps-display type="bool">true</fps-display> </rendering> <view> <dynamic> <enabled type="bool">false</enabled> </dynamic> </view> <menubar> <visibility type="bool">true</visibility> </menubar> <gui> <current-style type="int">0</current-style> </gui> <ai-traffic> <enabled type="bool">false</enabled> <level type="int">1</level> </ai-traffic> </sim> </PropertyList> ------------------------------------------------------------------------- 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