Robicd wrote:
>> This is because the author of the ac3d-export script made a conscious
>> decision not to export 2 sided Blender surfaces as 2 sided .ac surfaces.
>> The reason is that all the surfaces in Blender are 2 sided by default
>> and this would result in either a lot of work for modelers or something
>> close to a doubling of the polygon count for a model.
>>
>> The solution for modelers is to simply duplicate the surface that you
>> want to be two sided and then flip normals. Personally, I almost never
>> do this since zero thickness surfaces just don't occur in real life. I
>> also use shrink/fatten on one of the surfaces to give the object some
>> thickness.
>>
>> Josh
> 
> Thank you Josh, that brings lights on this topic to me :-)
> Anyway, that means the way to go is to import the Blender .ac exported 
> model into AC3D, apply the 2S command on the face I need to be double 
> sided, and then export the model again, right?
> I will definetely have to buy an AC3D license for this task only :-(

A better way would be to write a perl or awk script that, given a list
of objects, turns them into two sided objects. I tried this at one
point, but prefer to just use the method I described above. I use this
method to modify some of the crease angles in Blender since the number
used by the export script (auto smooth) only goes up to 80.

> 
> Any chance we convince the .ac Blender exporter plugin developer to 
> modify his script? People working with one sided faces into Blender 
> could set this as a default; this should be configurable inside Blender, 
> am I wrong? I have to say, I personally don't like the way this plugin 
> works in this case.
> 
>    Roberto
> 

Nope, I tried and he convinced me of his viewpoint. Sadly, the default
behavior in Blender is not configurable without recompiling.

Josh


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