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Kerkythea Rendering System • View topic - Render time longer with less objects
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Render time longer with less objects

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<<

anar

KT-Warrior

Posts: 190

Joined: Tue Oct 02, 2007 12:58 pm

Location: France

Post Tue May 27, 2008 4:28 pm

Render time longer with less objects

Hi,

I was playing around with KT trying to make an object invisible while still casting shadow (wich I was unable to figure out by the way...) and came up with strange rendering times.

Make a simple scene :
- 1 ground plane
- 1 sphere
- Physical sky
- no lights

Rendering time : 5 seconds (Photon Map Quick / 800x600)

Turn the sphere invisible and/or disabled.
Rendering time : more than 3 minutes.

Delete the sphere.
Rendering time : even more.

What's going on ?
Anyone has an explenation ?

Oh ! and by the way, if anyone knows how to make an invisible object that still casts shadows, he is welcome !

Thank you.
3D by passion
<<

alex

KT-Team
KT-Team

Posts: 2746

Joined: Sun Nov 26, 2006 10:12 am

Location: Clermont-Ferrand, France

Post Tue May 27, 2008 5:25 pm



Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.
<<

Fletch

KT-Team
KT-Team

Posts: 8564

Joined: Fri Oct 27, 2006 2:38 am

Location: Milwaukee, WI USA

Post Tue May 27, 2008 5:36 pm



<<

giannis

Site Admin

Posts: 4627

Joined: Mon Jul 04, 2005 9:59 am

Location: Athens, Greece

Post Tue May 27, 2008 6:32 pm

<<

anar

KT-Warrior

Posts: 190

Joined: Tue Oct 02, 2007 12:58 pm

Location: France

Post Tue May 27, 2008 6:40 pm

3D by passion
<<

rossgalloway

KT-Explorer

Posts: 430

Joined: Sun Mar 18, 2007 6:28 am

Post Tue May 27, 2008 9:58 pm

I know you can create an invisible object that cast shadows in 3Dmax, but no clue if you can do it in KT.

also, i found that a similar situation occured when i was testing out sky portals. Very simple scene with a sphere in a box and a sky portal on the window. The scene took substantially longer to render with the sky portal. I seem to remember being told that sky portals actually speed things up, but that was not the case.
<<

dentex

KT-Master

Posts: 914

Joined: Mon Nov 26, 2007 9:19 pm

Location: Italy

Post Wed May 28, 2008 7:14 am

dentex
<<

Extremefatalist

KT-GrandMaster

Posts: 1162

Joined: Thu Sep 01, 2005 6:26 am

Location: Athens, Greece

Post Wed May 28, 2008 8:40 am

Dreaming...

<<

dentex

KT-Master

Posts: 914

Joined: Mon Nov 26, 2007 9:19 pm

Location: Italy

Post Wed May 28, 2008 8:49 am

dentex
<<

alex

KT-Team
KT-Team

Posts: 2746

Joined: Sun Nov 26, 2006 10:12 am

Location: Clermont-Ferrand, France

Post Wed May 28, 2008 4:57 pm



Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.
<<

Extremefatalist

KT-GrandMaster

Posts: 1162

Joined: Thu Sep 01, 2005 6:26 am

Location: Athens, Greece

Post Wed May 28, 2008 5:06 pm

<<

anar

KT-Warrior

Posts: 190

Joined: Tue Oct 02, 2007 12:58 pm

Location: France

Post Wed May 28, 2008 5:58 pm

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3D by passion

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