Export Hair Particle Issue

[blanchg]

Your PC might be too fast :D

I fixed this error in v5.7.12 can you give it a go?

[Rac Leborg]

I think you've nailed it! :)

Just done 20,000 without any issue, which is enough for me. I will push it further over this weekend and report back.

Anyway, many thanks. I will message again soon.

[Rac Leborg]

Maybe I have a setting somewhere that is screwing everything up with this as it is still not working for me.
I have so much that I want to learn with Corona, so I'll move away from hair for a short while (to be honest, it's not at all a crucial requirement for me)and come back to it a bit later on when I have a better idea of what I am doing.
Sorry for the disappointing news on this.

[blanchg]

When you get back to it make sure you include the error, it might be something else that is easy to fix.

[Rac Leborg]

blanchg.

It's working. For sure this time. 100,000. Iv'e done a few tests and it always works!

I'm not sure what was wrong before? Possibly  a setting that I had got at an extreme level, or whatever. Anyway, excellent. Many thanks for all your help.

Cheers

[Zorian]

Does anybody know how to make hairparticiples withe texture assigned? I've tried everything. Adding textures in participle setting doesn't work. Adding textures in texture window doesn't work either.

Strand render is assigned and as a strand color UV texture map.

Log:

Error: Traceback (most recent call last):
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\operators\export.py", line 42, in execute
    result = export(self, scene, placeholders)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 557, in export
    return _write(self, scene, filepath, curves)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 612, in _write
    result = future.result(timeout = None)
  File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\concurrent\futures\_base.py", line 405, in result
    return self.__get_result()
  File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\concurrent\futures\_base.py", line 357, in __get_result
    raise self._exception
  File "C:\Program Files\Blender FouTraceback (most recent call last):
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\engine.py", line 497, in render
    render_start( self, scene)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\engine.py", line 174, in render_start
    render_scene( engine, scene)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\engine.py", line 333, in render_scene
    result = bpy.ops.corona.export()
  File "C:\Program Files\Blender Foundation\Blender\2.78\scripts\modules\bpy\ops.py", line 189, in __call__
    ret = op_call(self.idname_py(), None, kw)
RuntimeError: Error: Traceback (most recent call last):
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\operators\export.py", line 42, in execute
    result = export(self, scene, placeholders)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 557, in export
    return _write(self, scene, filepath, curves)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 612, in _write
    result = future.result(timeout = None)
  File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\concurrent\futures\_base.py", line 405, in result
    return self.__get_result()
  File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\concurrent\futures\_base.py", line 357, in __get_result
    raise self._exception
  File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\concurrent\futures\thread.py", line 55, in run
    result = self.fn(*self.args, **self.kwargs)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 688, in _export_object
    result = decide_format( self, file_path, obj, scene, curves, obj_ext)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 525, in decide_format
    return write_binary_obj( self, obj_path, obj, scene, curves, obj_ext)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 1261, in write_binary_obj
    uvlayer_buff, layers, mod)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 374, in streamcgeo_hairs
    result = future.result(timeout = None)
  File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\concurrent\futures\_base.py", line 405, in result
    return self.__get_result()
  File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\concurrent\futures\_base.py", line 357, in __get_result
    raise self._exception
  File "C:\Program Files\Blender Foundation\Blender\2.78\python\lib\concurrent\futures\thread.py", line 55, in run
    result = self.fn(*self.args, **self.kwargs)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 510, in extract_curve
    uvlayer_buff, layers, obj, scene)
  File "C:\Users\Adam\AppData\Roaming\Blender Foundation\Blender\2.78\scripts\addons\coronablender-render_corona-27583caece46\export.py", line 1504, in cgeo_write_mesh
    uv_layer_face_maps[layercount] = uv_face_mapping = [None] * len(face_index_pairs)
IndexError: list assignment index out of range

location: C:\Program Files\Blender Foundation\Blender\2.78\scripts\modules\bpy\ops.py:189



location: <unknown location>:-1

location: <unknown location>:-1

[burnin]

It seems that as soon as UV map is created, error appears.
After UV map is deleted the rendering works again.

[Zorian]

Yes, indeed - you can also change strand color in Corona Hair Rendering from UV Texture Map to None. Then it works fine, but without aby color.