This line: loadPrcFileData('', 'window-type offscreen') as well as the following: base.win.makeTextureBuffer("buffer", 256, 256) makes the Python interpreter crash. With "gl-debug true" and "notify-level-glgsg debug" in Config.prc, the output is as follows: :display:gsg:glgsg(debug): HAS EXT WGL_ARB_pixel_format 1 :display:gsg:glgsg(debug): HAS EXT WGL_ARB_multisample 0 :display:gsg:glgsg(debug): HAS EXT WGL_ARB_create_context 0 :display:gsg:glgsg(debug): GL_VENDOR = Intel :display:gsg:glgsg(debug): GL_RENDERER = Intel(R) HD Graphics :display:gsg:glgsg(debug): GL_VERSION = 2.1.0 - Build 8.15.10.2189 :display:gsg:glgsg(debug): GL_VERSION decoded to: 2.1 :display:gsg:glgsg(debug): GL_SHADING_LANGUAGE_VERSION = 1.20 - Intel Build 8.1 5.10.2189 :display:gsg:glgsg(debug): Detected GLSL version: 1.20 :display:gsg:glgsg(debug): Using compatibility profile :display:gsg:glgsg(debug): GL Extensions: GL_3DFX_texture_compression_FXT1 GL_ARB_color_buffer_float GL_ARB_depth_buffer_float GL_ARB_depth_texture GL_ARB_draw_buffers GL_ARB_draw_instanced GL_ARB_fragment_program GL_ARB_fragment_shader GL_ARB_framebuffer_sRGB GL_ARB_half_float_pixel GL_ARB_half_float_vertex GL_ARB_multitexture GL_ARB_occlusion_query GL_ARB_pixel_buffer_object GL_ARB_point_parameters GL_ARB_point_sprite GL_ARB_shader_objects GL_ARB_shading_language_100 GL_ARB_shadow GL_ARB_texture_border_clamp 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_non_power_of_two GL_ARB_texture_rectangle GL_ARB_texture_rg GL_ARB_transpose_matrix GL_ARB_vertex_array_object GL_ARB_vertex_buffer_object GL_ARB_vertex_program GL_ARB_vertex_shader 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_object 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_shadow_funcs GL_EXT_stencil_two_side GL_EXT_stencil_wrap GL_EXT_texture3D 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_lod_bias GL_EXT_texture_rectangle GL_EXT_texture_sRGB GL_EXT_texture_shared_exponent GL_EXT_texture_swizzle GL_EXT_transform_feedback GL_IBM_texture_mirrored_repeat GL_NV_blend_square GL_NV_conditional_render GL_NV_texgen_reflection GL_SGIS_generate_mipmap GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_WIN_swap_hint WGL_ARB_buffer_region WGL_ARB_extensions_string WGL_ARB_framebuffer_sRGB WGL_ARB_make_current_read WGL_ARB_pbuffer WGL_ARB_pixel_format WGL_ARB_pixel_format_float WGL_EXT_depth_float WGL_EXT_extensions_string WGL_EXT_swap_control :display:gsg:glgsg(debug): HAS EXT GL_KHR_debug 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_debug_output 0 :display:gsg:glgsg(debug): gl-debug enabled, but NOT supported. :display:gsg:glgsg(debug): HAS EXT GL_ARB_point_sprite 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_ES3_compatibility 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_storage 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_texture_storage 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_clear_texture 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_texture_array 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_cube_map 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_seamless_cube_map 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_cube_map_array 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_buffer_object 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_bgra 1 :display:gsg:glgsg(debug): HAS EXT GL_EXT_rescale_normal 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_vertex_array_bgra 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_vertex_array_bgra 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_vertex_type_10f_11f_11f_rev 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_multisample 0 :display:gsg:glgsg(debug): HAS EXT GL_SGIS_generate_mipmap 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_non_power_of_two 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_framebuffer_object 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_packed_depth_stencil 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_shadow 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_fragment_program_shadow 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_env_combine 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_env_crossbar 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_env_dot3 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_map_buffer_range 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_buffer_storage 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_vertex_array_object 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_tessellation_shader 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_geometry_shader4 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_geometry_shader4 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_vertex_program 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_fragment_program 1 :display:gsg:glgsg(debug): HAS EXT GL_NV_gpu_program5 0 :display:gsg:glgsg(debug): HAS EXT GL_NV_gpu_program4 0 :display:gsg:glgsg(debug): HAS EXT GL_NV_vertex_program3 0 :display:gsg:glgsg(debug): HAS EXT GL_NV_vertex_program2 0 :display:gsg:glgsg(debug): HAS EXT GL_NV_vertex_program1_1 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_compute_shader 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_vertex_attrib_64bit 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_uniform_buffer_object 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_instanced_arrays 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_draw_instanced 1 :display:gsg:glgsg(debug): HAS EXT GL_EXT_framebuffer_object 1 :display:gsg:glgsg(debug): HAS EXT GL_EXT_framebuffer_multisample 0 :display:gsg:glgsg(debug): HAS EXT GL_NV_framebuffer_multisample_coverage 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_framebuffer_blit 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_viewport_array 0 :display:gsg:glgsg(debug): Occlusion query counter provides 64 bits. :display:gsg:glgsg(debug): HAS EXT GL_ARB_timer_query 0 :display:gsg:glgsg(debug): HAS EXT GL_SGIS_texture_edge_clamp 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_border_clamp 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_texture_mirrored_repeat 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_texture_mirror_clamp 0 :display:gsg:glgsg(debug): max texture dimension = 4096, max 3d texture = 128, m ax 2d texture array = 0, max cube map = 2048 :display:gsg:glgsg(debug): max_elements_vertices = 1024, max_elements_indices = 1024 :display:gsg:glgsg(debug): vertex buffer objects are supported. :display:gsg:glgsg(debug): Supported compressed texture formats: GL_COMPRESSED_RGB_S3TC_DXT1_EXT GL_COMPRESSED_RGBA_S3TC_DXT3_EXT GL_COMPRESSED_RGBA_S3TC_DXT5_EXT GL_COMPRESSED_RGBA_S3TC_DXT1_EXT GL_COMPRESSED_RGB_FXT1_3DFX GL_COMPRESSED_RGBA_FXT1_3DFX :display:gsg:glgsg(debug): HAS EXT GL_EXT_texture_filter_anisotropic 1 :display:gsg:glgsg(debug): HAS EXT GL_ARB_shader_image_load_store 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_shader_image_load_store 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_sampler_objects 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_multi_bind 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_internalformat_query2 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_bindless_texture 0 :display:gsg:glgsg(debug): HAS EXT GL_ARB_get_program_binary 0 :display:gsg:glgsg(debug): HAS EXT GL_EXT_stencil_wrap 1 :display:gsg:glgsg(debug): HAS EXT GL_EXT_stencil_two_side 1 :display:gsg:glgsg(debug): max lights = 16 :display:gsg:glgsg(debug): max clip planes = 6 :display:gsg:glgsg(debug): max texture stages = 8 :display:gsg:glgsg(debug): HAS EXT GL_NV_gpu_program5 0 :display:gsg:glgsg(debug): HAS EXT GL_NV_gpu_program4 0 :display:gsg:glgsg(debug): HAS EXT GL_NV_fragment_program2 0 :display:gsg:glgsg(debug): HAS EXT GL_NV_fragment_program 0 :display:gsg:glgsg(debug): Supported Cg profiles: :display:gsg:glgsg(debug): arbvp1 :display:gsg:glgsg(debug): arbfp1 :display:gsg:glgsg(debug): glslv :display:gsg:glgsg(debug): glslf :display:gsg:glgsg(debug): Cg GLSL version = CG_GL_GLSL_120 :display:gsg:glgsg(debug): Cg latest vertex profile = arbvp1 :display:gsg:glgsg(debug): Cg latest fragment profile = arbfp1 :display:gsg:glgsg(debug): Cg latest geometry profile = unknown :display:gsg:glgsg(debug): basic-shaders-only #f :display:gsg:glgsg(debug): Cg active vertex profile = glslv :display:gsg:glgsg(debug): Cg active fragment profile = glslf :display:gsg:glgsg(debug): Cg active geometry profile = unknown :display:gsg:glgsg(debug): shader model = 2.0 :display:gsg:glgsg(debug): HAS EXT WGL_EXT_swap_control 1 :display:gsg:glgsg(debug): HAS EXT WGL_ARB_pbuffer 1 :display:gsg:glgsg(debug): HAS EXT WGL_ARB_pixel_format 1 :display:gsg:glgsg(debug): HAS EXT WGL_ARB_multisample 0 :display:gsg:glgsg(debug): HAS EXT WGL_ARB_render_texture 0 :display:gsg:glgsg(debug): Creating depth stencil renderbuffer. A workaround (at least for the base.win.makeTextureBuffer problem) is to do the buffer set-up differently, and either create a depth texture to attach to the depth slot, or request a 32-bit depth buffer, to prevent it from creating a depth-stencil renderbuffer. This seems to suggest a crash in the code that sets up a depth-stencil renderbuffer. Also see [url=https://www.panda3d.org/forums/viewtopic.php?f=4&t=18151]this topic[/url]. Operating system: Windows 8.1 64-bit Panda3D version: 1.10.0 dev. (Panda3D-SDK-1.10.0pre-9868d87.exe)