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Kerkythea Rendering System • View topic - Flipped Components in SK will lead to wrong normals in KT
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Flipped Components in SK will lead to wrong normals in KT

Moderator: ModeratorGroup

<<

Sergio

KT-Explorer

Posts: 224

Joined: Tue Jun 24, 2008 10:22 am

Location: United Kingdom

Post Thu Sep 09, 2010 6:16 pm

Flipped Components in SK will lead to wrong normals in KT

Hello guys I do not if you have come across this problem before. For example I made a component in SU and applied a texture to it ( i have checked that the faces are oriented properly in monochrome mode), then i made a copy of the same component and flip it in my model say on the red axis. Again all faces are correct and the textures applied as the original component, however when I export the model to KT the copy of the original component will have the faces in the back so will render as a shiny sort of surface, of course as it is the same material you can not change the normals in KT.

Any clues as why this happens? could it be a bug in the sk2kt exporter? because it appears to be ok in Sketchup.
<<

tridem

KT-Master

Posts: 982

Joined: Tue Aug 04, 2009 9:25 pm

Location: Treviso - Italy

Post Fri Sep 10, 2010 6:37 am

Hi Sergio, I cannot help you but I saw something similar in Thea forum...
http://www.thearender.com/forum/viewtop ... 666#p25666
<<

Sergio

KT-Explorer

Posts: 224

Joined: Tue Jun 24, 2008 10:22 am

Location: United Kingdom

Post Fri Sep 10, 2010 8:23 am

Hi Tridem, yes it is very weird. I realised about this accidentally as I had two identical elements located either side of the room facing each other, so the logical thing to do would be to flip the component in SK. Wrong!!!!!!!!1
Very frustrating! :(
<<

tridem

KT-Master

Posts: 982

Joined: Tue Aug 04, 2009 9:25 pm

Location: Treviso - Italy

Post Fri Sep 10, 2010 8:27 am

how did you solve? flipped normals in KT or what else?
<<

Sergio

KT-Explorer

Posts: 224

Joined: Tue Jun 24, 2008 10:22 am

Location: United Kingdom

Post Fri Sep 10, 2010 8:47 am

Funny enough I had to do the wrong thing and make the component unique in SK and apply the texture to the back face and re-export to KT. For some reasons I do not understand then is all good inside KT then. But tis is not the way it should behave
<<

Sergio

KT-Explorer

Posts: 224

Joined: Tue Jun 24, 2008 10:22 am

Location: United Kingdom

Post Fri Sep 10, 2010 8:49 am

I forgot you can not change normals in KT because is the same material so all you achieve is to reverse the problem. The component that was OK before would produce the wrong results.
<<

ToMasz

KT-Team
KT-Team

Posts: 1926

Joined: Fri Jul 22, 2005 9:23 am

Location: Poland

Post Mon Oct 04, 2010 10:07 am

<<

steve6

KT-Master

Posts: 523

Joined: Thu Jun 12, 2008 2:49 pm

Post Mon Oct 04, 2010 12:35 pm

<<

Sergio

KT-Explorer

Posts: 224

Joined: Tue Jun 24, 2008 10:22 am

Location: United Kingdom

Post Mon Oct 04, 2010 1:15 pm

Attachments
Flipped Component.skp
(171.25 KiB) Downloaded 374 times
Flipped Component.jpg
Flipped Component.kzx
(33.04 KiB) Downloaded 306 times
<<

massimo

KT-Wizard

Posts: 606

Joined: Sun Apr 05, 2009 3:58 pm

Location: Italy

Post Mon Oct 04, 2010 1:50 pm

Attachments
Cattura.JPG
the render is fine
Cattura_3.JPG
reversed faces on the flipped component
<<

Sergio

KT-Explorer

Posts: 224

Joined: Tue Jun 24, 2008 10:22 am

Location: United Kingdom

Post Mon Oct 04, 2010 3:10 pm

<<

massimo

KT-Wizard

Posts: 606

Joined: Sun Apr 05, 2009 3:58 pm

Location: Italy

Post Mon Oct 04, 2010 3:34 pm

Attachments
Cattura_2.JPG
from Patrick's&quot;diffuse &amp; spec map&quot;
Cattura.JPG
from &quot;woods by Darren (Sintra)&quot;
<<

Sergio

KT-Explorer

Posts: 224

Joined: Tue Jun 24, 2008 10:22 am

Location: United Kingdom

Post Mon Oct 04, 2010 3:40 pm

<<

massimo

KT-Wizard

Posts: 606

Joined: Sun Apr 05, 2009 3:58 pm

Location: Italy

Post Mon Oct 04, 2010 4:59 pm

<<

ToMasz

KT-Team
KT-Team

Posts: 1926

Joined: Fri Jul 22, 2005 9:23 am

Location: Poland

Post Mon Oct 04, 2010 6:31 pm


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