* I am experiencing to make a very simple track. Trying to follow https://supertuxkart.net/Making_Tracks I took **Blender 2.91** portable **and 2.82** on Linux Ubuntu. I took **stk-blender-master.zip**, extract the two folders **io_antarctica_scene and io_scene_spm**, which I **copied to the addons Blender folder**. In Blender, I **successfully activated those addons** (edit > preferences >...). I took the stk_media_repo with SVN... Question : **Where to put stk_pedia_repo ?** I created a track : - create Pane (named "driveline") 4 units for X, 12 units for Y. - **fail to apply texture : the guides are confused and mismatch Blender** - add a bézier curve "drivecurve", set this to 2D shape, - add modifiers for "driveline" : - modifier array, fit to "drivecurve", - modifier deform with "drivecurve", - build my track by extruding Bézier "drivecurve". The panes are multiplicated and follow the curve. OK - toggle cyclic on "drivecurve" to make a closed loop (I presume). - "applied" the 2 modifers of "driveline" - Merge close vertices by distances. Because I discovered that a lot of vertices are very close. I misunderstand why I have to duplicate the "driveline" : I presume one is for decoration and the other for gaming algorithms, don't I ? - I took one "driveline", I opened the loop (delete a face), add antennas (extrude 2 vertices) to build the start line. - I set this "driveline" to "driveline(main)" type in SuperTuxKart Object properties. - set the world to "is a supertuxkart track", named, folder named, groups=addons, left others settings by default. Tried to export the track, but fails : ``` Python: Traceback (most recent call last): File "/home/mmtsuchi/local_apps/blender-2.91.2-linux64/2.91/scripts/addons/io_antarctica_scene/stk_track.py", line 1259, in invoke return self.execute(context) File "/home/mmtsuchi/local_apps/blender-2.91.2-linux64/2.91/scripts/addons/io_antarctica_scene/stk_track.py", line 1273, in execute savescene_callback(self, self.filepath, exportImages, self.exportDrivelines, self.exportScene, self.exportMaterials) File "/home/mmtsuchi/local_apps/blender-2.91.2-linux64/2.91/scripts/addons/io_antarctica_scene/stk_track.py", line 1202, in savescene_callback TrackExport(self, sFilePath, exportImages, exportDrivelines and stk_utils.getSceneProperty(bpy.data.scenes[0], 'is_stk_node', 'false') != 'true', exportScene, exportMaterials) File "/home/mmtsuchi/local_apps/blender-2.91.2-linux64/2.91/scripts/addons/io_antarctica_scene/stk_track.py", line 1173, in __init__ export_tangent=self.are_tangent_needed) File "/home/mmtsuchi/local_apps/blender-2.91.2-linux64/2.91/scripts/modules/bpy/ops.py", line 132, in __call__ ret = _op_call(self.idname_py(), None, kw) **RuntimeError: Error: Python: Traceback (most recent call last): File "/home/mmtsuchi/local_apps/blender-2.91.2-linux64/2.91/scripts/addons/io_scene_spm/__init__.py", line 115, in execute export_spm.writeSPMFile(self.filepath, spm_parameters) File "/home/mmtsuchi/local_apps/blender-2.91.2-linux64/2.91/scripts/addons/io_scene_spm/export_spm.py", line 691, in writeSPMFile assert len(all_triangles) > 0** AssertionError location: /home/mmtsuchi/local_apps/blender-2.91.2-linux64/2.91/scripts/modules/bpy/ops.py:132 location: :-1 ``` I know, I must add checkpoints. Textures and materials make me confusing. STK, by its guide, has a special "materials" come with its "textures". So, I am lost with textures and media_stk_repo. Am I missing something for a very simple track ? a simple loop (a kind of "hello world") (no banana, no zipper, no trees, no useless decor....) just to see that building a track works well.