68 replies to this topic

[servaas]

hi,

I'm spending some time on better learning GI.
I made a little scene to play around with.
The image without table took 2m27sec to render but when I put the table and the flower it takes 2 HOURS and 27 min...
I didn't change the settings...

Could someone explain me why there's such a huge difference...?

(I want to add some more attributes and increase the quality for the final render, but if each object increase the render time it will take me a week to render... The image without the spere (AVANCE05.jpg) is the quality I want to preserve for this final render..)

I work on a Mac Pro:
Processor: 2 x 2,8 Ghz Quand-Core intel Xeon
Memory: 4GB 800Hz DDR2 FB-DIMM

Thanks,
=servaas=

Attached Thumbnails

• 
• 
• 

[dataflow]

what is the "Ray Depth" in your render settings?

try decreasing the "Ray Depth" and "Shadow Depth" to about 6

there in "Render Settings/Options"

Edited by dataflow, 04 November 2008 - 04:51 AM.

[colibert]

Ditto what data said and put a composoting tag on the glass and turn off generate GI and maybe turn off generate reflective caustics. that should fly through on a mac pro

Edited by colibert, 04 November 2008 - 04:37 AM.

[servaas]

Hi,

thanks for the tips.
But un der the compositing tag I cant' found 'generate GI' and 'generate reflective caustics'.
I only see the settings as in the image..

What do I dor wrong...?

Cheers,
=servaas=

to data:

My ray depth and schadow depth were 15.
I changed them to 6 as you said..

=servaas=

Attached Thumbnails

• 

[colibert]

ahh, sorry, your running 10.5, there are reflective and refractive caustics in R11, although check the caustics tab in the main render settings.

the composoting tag you have on the glass should help with seen by GI unchecked like you have done.

also under the illumination tab in the glass material you can adjust the GI from there.

Post the file if you like and il have a look, could be something else

Has what you'v done made any difference?

i did some glass the other day as a test, this is in vray so doesnt help, but this renders in 5 minutes

[mala]

Colibert....don't think you have enough glass in that render....can we have some more please http://www.c4dcafe.com/ipb/public/style_emoticons/default/laugh.gif

looks really good though http://www.c4dcafe.com/ipb/public/style_emoticons/default/spoton.gif

Edited by mala, 04 November 2008 - 06:16 AM.

[colibert]

i was toying with the idea of glass sofa's

[servaas]

I've put compositing, enabled GI accuracy and played around with the settings..

I'll gonna transalte my file in english and I'll post it here.

Thanks allready,
=servaas=

[colibert]

cool

[servaas]

hi,

here is my scene.
Problem is that my HDR file has a size of 45MB..
So it's not included...
But I suppose you can test it with an other one ?

Cheers,
=servaas=

[colibert]

yeah thats fine, theres a good chance il have it anyway unless you have made it yourself, Im just rendering something but once its done il take a look

[servaas]

actually it's one I made myself down here in Senegal :-)

But the exact light isn't that import for the moment.
Feel free to use another one :-)

=servaas=

[servaas]

here is the little jpg version of my HDR image.
The result is not the same but it's close..

=servaas=

Attached Thumbnails

• 

Edited by servaas, 04 November 2008 - 07:22 AM.

[servaas]

another picture that can be used..

[colibert]

that does take a while doesnt it!!

i reckon first off, the Gi set to generate at 1250 isn't not helping, from memory with AR 2.6 if you go over 90-95 you will start to have big impact on render times, and its probably that whats causing the light to be overblown on the floor by the window, il let it render and then see if i can change it to match, adding an area light where the window is will help out,
you know your going to have problems animating that in AR 2.6 and not getting it to flicker, its possible but will need a bit of fiddling.

let me have a play with it,

Edited by colibert, 04 November 2008 - 07:38 AM.

[servaas]

The render take a while because of the plant I think...

this a little animation test (don't bother about the camera mouvements..) I did yesterday with even higher GI settings (took me 6 hours) to avoid flickering..

Thanks for playing around with it!
=servaas=

Attached Files

•  GI2.mov   514.72KB   51 downloads

[colibert]

6 hours isnt that bad for that at all, and its really clean, goes to prove it can be done.
how come its gone up to over 2 hours a frame from that??!

[servaas]

the problem came up when I put the table with glass and the plant...

And the 2h27min was with lower settings then th ones you see in the animation.. !!

=servaas=

[colibert]

im not 100% sure but you have fog enabled in the glass, could that be causing it?

[servaas]

No idea, I'll have I try right away

But I also noticed that the plant causes a big problem..

=servaas=