You have to convert CSG into SDS polygons and after importing obj into
blender you should flip (normalize) normals in blender.
Also converting sds object into quads could help. Also note that
booelans are not converted in OBJ format. So you have to make boolean
operations
again in blender.
Realsoft sometimes flips some of the normals but they are still in
there.Thats why you see dark polygons in other softwares.
Ville
Artur Żmudzki kirjoitti 3.11.2019 19:35:
Hi LeeE,
Thanks for reply.
In the menatime i fugured out that CSG cylinder object is causing
Realsoft to crash while exporting objects to OBJ.
So.... I would say You are right, it has something to do with CSG
objects :-)
Moreover some basic cubes are missing some faces :-)
By eliminating cylinders I was able more or less to get some result.
What is more interesting some of the planes doesn't behave properly
after conversion.
They render darker than they should be. At this stage I've got no idea
what kind of property is causing this in Blender so just recreating
them when needed.
Regards,
Artur
On 2019-11-01 20:49, leee wrote:
On Friday 01 November 2019 00:15:40 Artur Żmudzki wrote:
Hi All,
I'm trying to export some of my projects from Realsoft 6.1 to OBJ
format.
It seems to be the only valuable format while moving to Blender.
Other
formats doesn't work good enough.
I'm only interested in geometry, no need to export materials and etc
at
all.
Unfotunately Realsoft is crashing almost all the time. I'm able to
export some more complex parts of a given project while unable to
export
some very simply other parts.
Any help will be appreciated.
Regards,
Artur
Hi Artur,
do any of your models incorporate any analytic/CSG parts? I think you
may
need to convert any of this type of geometry to a mesh/surface type
before
exporting.
This is because you can't directly map an analytic geometry object to
a
mesh/surface geometry object without reparameterizing it. For
example, an
analytic 'disk' object only needs one parameter - its radius - but a
nurbs/sds disk object would also need to know in to how many segments
the
the circle must be divided, thus requiring an additional parameter.
I used the export to .OBJ format feature quite a lot when I was making
aircraft models for the flightgear flight sim and although there were
some
minor 'quirks' when using the Linux vers of RS3D I was able to get
some
very complex models exported Ok. Iirc, the hierarchy wasn't preserved
but
the individual models parts were, so I could still animate the
individual
sub-objects after recreating the hierarchy after export.
However, being mindful of the limitations of surface geometry formats
I only
ever tried to export SDS objects to .OBJ format because there is a
direct
mapping between the the two.
I also found it a good idea to look at my SDS models in the
'flat/polygonal'
form before exporting, to check that any non-tri polys looked Ok -
difficult to explain but easy to see - they can appear to 'curve' in
the
wrong direction - manually converting them to tris before export is
the
best way around this.
LeeE
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