Smallworld opened this issue on Dec 10, 2004 ยท 11 posts
Smallworld posted Fri, 10 December 2004 at 5:53 AM
Brian
Fortitudine Vincimus - "by endurance we conquer."
Smallworld posted Fri, 10 December 2004 at 5:56 AM
Brian
Fortitudine Vincimus - "by endurance we conquer."
TOXE posted Fri, 10 December 2004 at 7:12 AM
Have you tried to increase interpolation value or to turn it off? Also, you can increase the photon count to have a better result. -TOXE
FWTempest posted Fri, 10 December 2004 at 7:33 AM
agreed... also increase the lighting quality to 'excellent' or 'best' and you might have to reduce the accuracy down as low as 1 pixel in order to get the results you want.
MarkBremmer posted Fri, 10 December 2004 at 8:38 AM
Using the "Improved Edges" option will significantly help this. Engaging that option sometimes has better results than just the iterpolation or photon solutions.
TOXE posted Fri, 10 December 2004 at 9:26 AM
yes Mark, but it don't work only with Indirect Light? Or there is a way to use it with simple GI?
Smallworld posted Fri, 10 December 2004 at 10:40 AM
Success! Thanks for the tips guys! I have ran a half dozen tests with various settings and the one that seems best is with Interpolation off and lighting quality set to Best, with lighting accuracy at 2 pixels. This gives a lovely result on my test piece. I seems that it renders much more quickly with Interpolation off, way faster. Anybody know what interpolation does and when it might be necessary to use it? Thanks for the help, Brian. By the way, I am a Rhino man for ever but I'm going to be using C4pro a lot as it now imports Rhino nurbs directly. Happy days ahead.
Brian
Fortitudine Vincimus - "by endurance we conquer."
falconperigot posted Fri, 10 December 2004 at 10:59 AM
Interpolation is in there simply so you have to visit this forum. We sponsor it ever year! ;-)
Seriously, it is supposed to speed up rendering by using a caching mechanism to avoid recomputing the light for every pixel. This becomes more important if you are using indirect lighting.
Mark
Message edited on: 12/10/2004 11:00
Smallworld posted Fri, 10 December 2004 at 11:27 AM
Actually I got my times mixed up, it was seven mins with it on and eight with it off. See you all soon.
Brian
Fortitudine Vincimus - "by endurance we conquer."
ShawnDriscoll posted Fri, 10 December 2004 at 6:14 PM
Interpolation seems to be more like a draft render mode. Setting to 100% seems better than leaving it at 20%. But turning if off entirely gives even better results (though it takes longer to render). Like all the Carrara render controls, it's ambiguous. The manual describes pretty much every render control as "Setting this control will control its setting".
The fact that it took you so many tries and you still weren't getting better results says a lot about the manual. Everyone here though has gone through the initiation process already. Welcome to the party.
Message edited on: 12/10/2004 18:15
MarkBremmer posted Sat, 11 December 2004 at 4:10 PM
Toxe, your are correct about the Improved Edges only being available with Indirect Lighting. Using pure G.I. doesn't allow for it. However, as the image above shows, using Indirect Lighting with Improved Edges creates a nice image that is artifact free - at least in this example.
Interpolation: Ahhh, always the mystery. Interpolation accuracy (educated guessing) simply tells Carrara how "correct" you want its light calculation to be. At the default 20%, Carrara is only accurate on 20% of its calculations - the rest uses a close-is-good-enough approximation. Turning Interpolation up to 100% or turning it completely off means Carrara does all the math and calculations for the the light rays. Of course doing all that math takes longer.
On scenes with no transparent objects, the interpolation difference is not that great. On scenes with glass objects, these settings are the difference in completing the image in your lifetime or not!
Message edited on: 12/11/2004 16:13