I am having an issue where a part will preview satisfactorily but renders incorrectly. It has similarities to this issue: https://github.com/openscad/openscad/issues/1591 I have tried on two different Dell PCs, one Optiplex 7010 and the other a Latitude E6530. Both have Intel HD Graphics 4000 cards. I am using the most up to date graphics drivers I can get to install. I have tried using both these versions: OpenSCAD version 2015.03-2 OpenSCAD version 2018.09.05 (git 40af343) Reading the above issue I have tried with and without the "Force Goldfeather setting having no success either way with either version I have attached the files needed to replicate the issue: Modify.scad <http://forum.openscad.org/file/t1222/Modify.scad> Holder_re-rendered_using_OpenSCAD.stl <http://forum.openscad.org/file/t1222/Holder_re-rendered_using_OpenSCAD.stl> Holder_as_rendered.stl <http://forum.openscad.org/file/t1222/Holder_as_rendered.stl> Here is the library info for the OPtiplex 7010 using OpenSCAD version 2018.09.05 (git 40af343) : OpenSCAD Version: 2018.09.05 (git 40af343) System information: Windows(TM) 10.0 SP 0.0 NTW 1 MSDN 724833 4 CPUs 3.89 GB RAM Compiler: GCC "7.3.0" 64bit Boost version: 1_60 Eigen version: 3.2.5 CGAL version, kernels: 4.11, Cartesian, Extended_cartesian, Epeck OpenCSG version: OpenCSG 1.4.2 Qt version: 5.11.1 QScintilla version: 2.10.4 MingW build: MingW64 GLib version: 2.50.2 libzip version: 1.5.1 Application Path: C:/Program Files/OpenSCAD Documents Path: C:\Users\Andy\Documents Resource Path: C:/Program Files/OpenSCAD User Library Path: C:/Users/Andy/Documents/OpenSCAD/libraries User Config Path: C:\Users\Andy\AppData\Local/OpenSCAD Backup Path: C:/Users/Andy/Documents/OpenSCAD/backups OPENSCADPATH: OpenSCAD library path: C:/Users/Andy/Documents/OpenSCAD/libraries C:/Program Files/OpenSCAD\libraries OPENSCAD_FONT_PATH: OpenSCAD font path: GLEW version: 1.12.0 OpenGL Version: 4.0.0 - Build 10.18.10.4885 GL Renderer: Intel(R) HD Graphics 4000 GL Vendor: Intel RGBA(8888), depth(24), stencil(8) GL_ARB_framebuffer_object: yes GL_EXT_framebuffer_object: yes GL_EXT_packed_depth_stencil: yes Qt graphics widget: QGLWidgetGL Extensions: GL_3DFX_texture_compression_FXT1 GL_ARB_ES2_compatibility GL_ARB_ES3_compatibility GL_ARB_arrays_of_arrays GL_ARB_base_instance GL_ARB_blend_func_extended GL_ARB_buffer_storage GL_ARB_color_buffer_float GL_ARB_compatibility GL_ARB_compressed_texture_pixel_storage GL_ARB_conservative_depth GL_ARB_copy_buffer GL_ARB_debug_output GL_ARB_depth_buffer_float GL_ARB_depth_clamp GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_buffers_blend GL_ARB_draw_elements_base_vertex GL_ARB_draw_indirect GL_ARB_draw_instanced GL_ARB_explicit_attrib_location GL_ARB_fragment_coord_conventions GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_framebuffer_no_attachments GL_ARB_framebuffer_object GL_ARB_framebuffer_sRGB GL_ARB_geometry_shader4 GL_ARB_get_program_binary GL_ARB_gpu_shader5 GL_ARB_gpu_shader_fp64 GL_ARB_half_float_pixel GL_ARB_half_float_vertex GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_internalformat_query2 GL_ARB_map_buffer_alignment GL_ARB_map_buffer_range GL_ARB_multi_draw_indirect GL_ARB_multisample GL_ARB_multitexture GL_ARB_occlusion_query GL_ARB_occlusion_query2 GL_ARB_pixel_buffer_object GL_ARB_point_parameters GL_ARB_point_sprite GL_ARB_program_interface_query GL_ARB_provoking_vertex GL_ARB_robustness GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_seamless_cube_map GL_ARB_separate_shader_objects GL_ARB_shader_atomic_counters GL_ARB_shader_bit_encoding GL_ARB_shader_objects GL_ARB_shader_precision GL_ARB_shader_subroutine GL_ARB_shading_language_100 GL_ARB_shading_language_420pack GL_ARB_shading_language_packing GL_ARB_shadow GL_ARB_stencil_texturing GL_ARB_sync GL_ARB_tessellation_shader GL_ARB_texture_border_clamp GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_buffer_range GL_ARB_texture_compression GL_ARB_texture_compression_bptc GL_ARB_texture_compression_rgtc GL_ARB_texture_cube_map GL_ARB_texture_cube_map_array 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_gather GL_ARB_texture_multisample GL_ARB_texture_non_power_of_two GL_ARB_texture_query_lod GL_ARB_texture_rectangle GL_ARB_texture_rg GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_storage_multisample GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_transform_feedback_instanced GL_ARB_transpose_matrix GL_ARB_uniform_buffer_object GL_ARB_vertex_array_bgra GL_ARB_vertex_array_object GL_ARB_vertex_attrib_64bit GL_ARB_vertex_attrib_binding GL_ARB_vertex_buffer_object GL_ARB_vertex_program GL_ARB_vertex_shader GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_ARB_window_pos GL_ATI_separate_stencil GL_EXT_abgr GL_EXT_bgra GL_EXT_blend_color GL_EXT_blend_equation_separate GL_EXT_blend_func_separate GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_clip_volume_hint GL_EXT_compiled_vertex_array GL_EXT_draw_buffers2 GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_framebuffer_object 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_rescale_normal GL_EXT_secondary_color GL_EXT_separate_specular_color GL_EXT_shader_integer_mix GL_EXT_shadow_funcs GL_EXT_stencil_two_side GL_EXT_stencil_wrap GL_EXT_texture3D GL_EXT_texture_array GL_EXT_texture_buffer GL_EXT_texture_compression_s3tc GL_EXT_texture_edge_clamp GL_EXT_texture_env_add GL_EXT_texture_env_combine GL_EXT_texture_filter_anisotropic GL_EXT_texture_integer GL_EXT_texture_lod_bias GL_EXT_texture_rectangle GL_EXT_texture_sRGB GL_EXT_texture_sRGB_decode GL_EXT_texture_shared_exponent GL_EXT_texture_snorm GL_EXT_texture_storage GL_EXT_texture_swizzle GL_EXT_transform_feedback GL_IBM_texture_mirrored_repeat GL_INTEL_map_texture GL_INTEL_performance_queries GL_INTEL_performance_query GL_KHR_blend_equation_advanced GL_KHR_debug GL_NV_blend_square GL_NV_conditional_render GL_NV_primitive_restart GL_NV_texgen_reflection GL_SGIS_generate_mipmap GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_SUN_multi_draw_arrays GL_WIN_swap_hint WGL_ARB_buffer_region WGL_ARB_create_context WGL_ARB_create_context_profile WGL_ARB_create_context_robustness WGL_ARB_extensions_string WGL_ARB_framebuffer_sRGB WGL_ARB_make_current_read WGL_ARB_multisample WGL_ARB_pbuffer WGL_ARB_pixel_format WGL_ARB_pixel_format_float WGL_EXT_create_context_es2_profile WGL_EXT_create_context_es_profile WGL_EXT_depth_float WGL_EXT_extensions_string WGL_EXT_pixel_format_packed_float WGL_EXT_swap_control WGL_EXT_swap_control_tear WGL_NV_DX_interop Any ideas on what I could try? -- Sent from: http://forum.openscad.org/

Yes it does seem to be a bug. Preview is correct. The render includes the negative objects and so does the exported STL, which is then not manifold according to NetFabb. [image: image.png] I can't find anything wrong with the original STL but it seems to confuse GGAL. Even weirder things happen if I union the STL with large cube([400,100, 20], center = true) in MyImport(); Then the cube gets subtracted and the cylinders added. It's like difference is working backwards. I wonder if the original STL is inside out and NetFabb doesn't tell me? On Tue, 2 Oct 2018 at 12:10, Experimentalist < experimentalist@aaawesome.co.uk> wrote: > I am having an issue where a part will preview satisfactorily but renders > incorrectly. It has similarities to this issue: > > https://github.com/openscad/openscad/issues/1591 > > I have tried on two different Dell PCs, one Optiplex 7010 and the other a > Latitude E6530. Both have Intel HD Graphics 4000 cards. I am using the most > up to date graphics drivers I can get to install. > > I have tried using both these versions: > > OpenSCAD version 2015.03-2 > OpenSCAD version 2018.09.05 (git 40af343) > > Reading the above issue I have tried with and without the "Force > Goldfeather > setting having no success either way with either version > > I have attached the files needed to replicate the issue: > > Modify.scad <http://forum.openscad.org/file/t1222/Modify.scad> > Holder_re-rendered_using_OpenSCAD.stl > < > http://forum.openscad.org/file/t1222/Holder_re-rendered_using_OpenSCAD.stl> > > Holder_as_rendered.stl > <http://forum.openscad.org/file/t1222/Holder_as_rendered.stl> > > Here is the library info for the OPtiplex 7010 using OpenSCAD version > 2018.09.05 (git 40af343) : > > OpenSCAD Version: 2018.09.05 (git 40af343) > System information: Windows(TM) 10.0 SP 0.0 NTW 1 MSDN 724833 4 CPUs 3.89 > GB > RAM > Compiler: GCC "7.3.0" 64bit > Boost version: 1_60 > Eigen version: 3.2.5 > CGAL version, kernels: 4.11, Cartesian, Extended_cartesian, Epeck > OpenCSG version: OpenCSG 1.4.2 > Qt version: 5.11.1 > QScintilla version: 2.10.4 > MingW build: MingW64 > GLib version: 2.50.2 > libzip version: 1.5.1 > Application Path: C:/Program Files/OpenSCAD > Documents Path: C:\Users\Andy\Documents > Resource Path: C:/Program Files/OpenSCAD > User Library Path: C:/Users/Andy/Documents/OpenSCAD/libraries > User Config Path: C:\Users\Andy\AppData\Local/OpenSCAD > Backup Path: C:/Users/Andy/Documents/OpenSCAD/backups > OPENSCADPATH: > OpenSCAD library path: > C:/Users/Andy/Documents/OpenSCAD/libraries > C:/Program Files/OpenSCAD\libraries > > OPENSCAD_FONT_PATH: > OpenSCAD font path: > GLEW version: 1.12.0 > OpenGL Version: 4.0.0 - Build 10.18.10.4885 > GL Renderer: Intel(R) HD Graphics 4000 > GL Vendor: Intel > RGBA(8888), depth(24), stencil(8) > GL_ARB_framebuffer_object: yes > GL_EXT_framebuffer_object: yes > GL_EXT_packed_depth_stencil: yes > > Qt graphics widget: QGLWidgetGL Extensions: > GL_3DFX_texture_compression_FXT1 > GL_ARB_ES2_compatibility > GL_ARB_ES3_compatibility > GL_ARB_arrays_of_arrays > GL_ARB_base_instance > GL_ARB_blend_func_extended > GL_ARB_buffer_storage > GL_ARB_color_buffer_float > GL_ARB_compatibility > GL_ARB_compressed_texture_pixel_storage > GL_ARB_conservative_depth > GL_ARB_copy_buffer > GL_ARB_debug_output > GL_ARB_depth_buffer_float > GL_ARB_depth_clamp > GL_ARB_depth_texture > GL_ARB_draw_buffers > GL_ARB_draw_buffers_blend > GL_ARB_draw_elements_base_vertex > GL_ARB_draw_indirect > GL_ARB_draw_instanced > GL_ARB_explicit_attrib_location > GL_ARB_fragment_coord_conventions > GL_ARB_fragment_program > GL_ARB_fragment_program_shadow > GL_ARB_fragment_shader > GL_ARB_framebuffer_no_attachments > GL_ARB_framebuffer_object > GL_ARB_framebuffer_sRGB > GL_ARB_geometry_shader4 > GL_ARB_get_program_binary > GL_ARB_gpu_shader5 > GL_ARB_gpu_shader_fp64 > GL_ARB_half_float_pixel > GL_ARB_half_float_vertex > GL_ARB_instanced_arrays > GL_ARB_internalformat_query > GL_ARB_internalformat_query2 > GL_ARB_map_buffer_alignment > GL_ARB_map_buffer_range > GL_ARB_multi_draw_indirect > GL_ARB_multisample > GL_ARB_multitexture > GL_ARB_occlusion_query > GL_ARB_occlusion_query2 > GL_ARB_pixel_buffer_object > GL_ARB_point_parameters > GL_ARB_point_sprite > GL_ARB_program_interface_query > GL_ARB_provoking_vertex > GL_ARB_robustness > GL_ARB_sample_shading > GL_ARB_sampler_objects > GL_ARB_seamless_cube_map > GL_ARB_separate_shader_objects > GL_ARB_shader_atomic_counters > GL_ARB_shader_bit_encoding > GL_ARB_shader_objects > GL_ARB_shader_precision > GL_ARB_shader_subroutine > GL_ARB_shading_language_100 > GL_ARB_shading_language_420pack > GL_ARB_shading_language_packing > GL_ARB_shadow > GL_ARB_stencil_texturing > GL_ARB_sync > GL_ARB_tessellation_shader > GL_ARB_texture_border_clamp > GL_ARB_texture_buffer_object_rgb32 > GL_ARB_texture_buffer_range > GL_ARB_texture_compression > GL_ARB_texture_compression_bptc > GL_ARB_texture_compression_rgtc > GL_ARB_texture_cube_map > GL_ARB_texture_cube_map_array > 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_gather > GL_ARB_texture_multisample > GL_ARB_texture_non_power_of_two > GL_ARB_texture_query_lod > GL_ARB_texture_rectangle > GL_ARB_texture_rg > GL_ARB_texture_rgb10_a2ui > GL_ARB_texture_storage > GL_ARB_texture_storage_multisample > GL_ARB_texture_swizzle > GL_ARB_timer_query > GL_ARB_transform_feedback2 > GL_ARB_transform_feedback3 > GL_ARB_transform_feedback_instanced > GL_ARB_transpose_matrix > GL_ARB_uniform_buffer_object > GL_ARB_vertex_array_bgra > GL_ARB_vertex_array_object > GL_ARB_vertex_attrib_64bit > GL_ARB_vertex_attrib_binding > GL_ARB_vertex_buffer_object > GL_ARB_vertex_program > GL_ARB_vertex_shader > GL_ARB_vertex_type_2_10_10_10_rev > GL_ARB_viewport_array > GL_ARB_window_pos > GL_ATI_separate_stencil > GL_EXT_abgr > GL_EXT_bgra > GL_EXT_blend_color > GL_EXT_blend_equation_separate > GL_EXT_blend_func_separate > GL_EXT_blend_minmax > GL_EXT_blend_subtract > GL_EXT_clip_volume_hint > GL_EXT_compiled_vertex_array > GL_EXT_draw_buffers2 > GL_EXT_draw_range_elements > GL_EXT_fog_coord > GL_EXT_framebuffer_blit > GL_EXT_framebuffer_multisample > GL_EXT_framebuffer_object > 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_rescale_normal > GL_EXT_secondary_color > GL_EXT_separate_specular_color > GL_EXT_shader_integer_mix > GL_EXT_shadow_funcs > GL_EXT_stencil_two_side > GL_EXT_stencil_wrap > GL_EXT_texture3D > GL_EXT_texture_array > GL_EXT_texture_buffer > GL_EXT_texture_compression_s3tc > GL_EXT_texture_edge_clamp > GL_EXT_texture_env_add > GL_EXT_texture_env_combine > GL_EXT_texture_filter_anisotropic > GL_EXT_texture_integer > GL_EXT_texture_lod_bias > GL_EXT_texture_rectangle > GL_EXT_texture_sRGB > GL_EXT_texture_sRGB_decode > GL_EXT_texture_shared_exponent > GL_EXT_texture_snorm > GL_EXT_texture_storage > GL_EXT_texture_swizzle > GL_EXT_transform_feedback > GL_IBM_texture_mirrored_repeat > GL_INTEL_map_texture > GL_INTEL_performance_queries > GL_INTEL_performance_query > GL_KHR_blend_equation_advanced > GL_KHR_debug > GL_NV_blend_square > GL_NV_conditional_render > GL_NV_primitive_restart > GL_NV_texgen_reflection > GL_SGIS_generate_mipmap > GL_SGIS_texture_edge_clamp > GL_SGIS_texture_lod > GL_SUN_multi_draw_arrays > GL_WIN_swap_hint > WGL_ARB_buffer_region > WGL_ARB_create_context > WGL_ARB_create_context_profile > WGL_ARB_create_context_robustness > WGL_ARB_extensions_string > WGL_ARB_framebuffer_sRGB > WGL_ARB_make_current_read > WGL_ARB_multisample > WGL_ARB_pbuffer > WGL_ARB_pixel_format > WGL_ARB_pixel_format_float > WGL_EXT_create_context_es2_profile > WGL_EXT_create_context_es_profile > WGL_EXT_depth_float > WGL_EXT_extensions_string > WGL_EXT_pixel_format_packed_float > WGL_EXT_swap_control > WGL_EXT_swap_control_tear > WGL_NV_DX_interop > > Any ideas on what I could try? > > > > -- > Sent from: http://forum.openscad.org/ > > _______________________________________________ > OpenSCAD mailing list > Discuss@lists.openscad.org > http://lists.openscad.org/mailman/listinfo/discuss_lists.openscad.org >

The original STL was created using another OpenSCAD script which I attach below for reference: pegstr.scad <http://forum.openscad.org/file/t1222/pegstr.scad> Although the output of pegstr.scad is manifold it showed some degenerated faces in netfabb so I still tried repairing it using: netfabb Basic 6.4.0 252 i386/Win32 (2015/09/11) . . . weird indeed -- Sent from: http://forum.openscad.org/

On 02. okt. 2018 13:09, Experimentalist wrote: > I am having an issue where a part will preview satisfactorily but renders > incorrectly. It has similarities to this issue: > STL files contain single precision coordinates and are generally not well suited as input for further booleans... In this case, your file "Holder_as_rendered.stl" is in my tool reported as having 48 collapsed or zero area faces. This classification is obviously subject to tolerances and interpretation. A face is here 'collapsed' if one edge is shorter than the distance tolerance (default=0.01) and has zero area if the computed area is less than the area tolerance (default 1.0E-6). 48 of the faces in your file failed one or both of these checks. I uploaded a version of your file with those faces removed, you can get it at (expires 2018-10-09 @ 18:00:06 GMT) http://www.fileconvoy.com/dfl.php?id=g8a527fc901f5514a1000118775cefd6b3332589010 (The uploaded file is compressed in a zip file) Carsten Arnholm

I do not know why it works, but if you rotate the imported STL file 180° about the X axis, it renders correctly. At least it works on my version 2015.03.2 ????? <http://forum.openscad.org/file/t1309/holder.jpg> -- Sent from: http://forum.openscad.org/

It renders correctly? -- Sent from: http://forum.openscad.org/

Hi Thanks a lot for that, I downloaded the file. May I ask what program you used to analyse and fix the file? Ex. -- Sent from: http://forum.openscad.org/

On 2018-10-08 11:28, Experimentalist wrote: > Hi > > Thanks a lot for that, I downloaded the file. May I ask what program > you > used to analyse and fix the file? So the fixed file solved the problem you had? I wrote that program myself from scratch. Its current working name is abm_polyfix. I have been meaning to provide a service on the web where this tool could be used, but it has taken longer than anticipated. Carsten Arnholm

Experimentalist wrote > It renders correctly? Yes. If you look at the picture I posted, you will see "Rendering finished" at the bottom. Also note the orientation of the X-Y-Z axis. I rotated the rendering so that it appears "right side up". -- Sent from: http://forum.openscad.org/

Sorry for the slow reply Yes it fixed it, thanks. -- Sent from: http://forum.openscad.org/