Bugslat when rendering is almost completed

Hi, i'm having serious problems when i want to render images bigger than 1024x768, everything works fine, but when antialiasing gets around 97% and normaly should display the jpg image i get a bugsplat. (i purged the file, copy-pasted in a new window etc,etc,)
Is this a common bug, or has it something to do with my computer?

I hope you guys can help me out, THNX.

(as you can see my english is not really good, but i think you get the message)

Moderator
Registered: May 09, 2007
Posts: 461

Nov 06, 2009 at 01:15 PM

This is most likely due to hardware limitations of your computer. Can you post the model on our ftp here: https://www.box.net/drop/Podium16/15e2926ed9

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Arjan2912
Registered: Nov 06, 2009
Posts: 5

Nov 06, 2009 at 02:09 PM

Thanks for your reply, i added the model slaapkamer.skp (dutch for bedroom) so you can take a look.
Do you have any suggestions to fix this (hardware) problem.
What minimal specs do i need to render large models without big problems??

Moderator
Registered: May 09, 2007
Posts: 461

Nov 06, 2009 at 02:32 PM

For big (high poly) models I use i7 Quad (8 threads) @3.33GHz with 6.0GB RAM on 64 bit Vista. I've attached 2 images I made one at 2048x1536 and one widescreen 1854x917 using the viewport resolution on my monitor. These both finished before my dual core (2 threads) @2.4 GHz with 3.25 GB RAM on 32bit XP could finish one image at 2048x1536 (actually still waiting to see if it does in fact finish, I'll post results soon).

Attached Images:

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If you can't find an answer in the forum or need help with a model, send your questions and models to support@cadalog-inc.com. If the model is too big to post or e-mail upload it here: https://www.box.net/drop/Podium16/15e2926ed9

Moderator
Registered: May 09, 2007
Posts: 461

Nov 06, 2009 at 02:34 PM

Dual core just finished the 2048x1536, about 10 minutes longer than the quad core.

Render Critic
Registered: Dec 04, 2006
Posts: 2,662

Nov 06, 2009 at 02:54 PM

Hi Arjan, what are the specs of your current machine?

The most important thing is arguably the CPU. For rendering in practically every engine this is the single most important thing because it determines speed.

RAM is important because your machine needs to hold a lot of data in memory which it has to send to the CPU for processing. This is the most important thing for large models.

Note that with 32 bit Windows systems (probably over 95% of them) there is a physical limit of 3-4Gb RAM depending on the configuration, of which only 2-3Gb will be available due to the way Windows handles memory allocation.

Macs can address a lot more RAM, but typically, depending on the hardware, machines are limited to 4Gb, 8Gb or 32GB even with a 32-bit OS because it uses a trick called PAE - Physical Address Extension.

As a result, Macs tend to be better at handling larger models, but we haven't heard much about the 64 bit version of Windows 7 yet.

With the new Snow Leopard OS, the limit is theoretically a lot higher.

Not bad for an 'ipod' sid & solo

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Thomas Fuller (1608 - 1661)

Moderator
Registered: May 09, 2007
Posts: 461

Nov 06, 2009 at 03:05 PM

I was hoping someone would jump in, you explained that a lot better than I could Jim. Installing windows 7 64-bit right now. Look forward to some results next week

I'll be interested to compare it to our Quad Core "iPod" tower.

__________________
If you can't find an answer in the forum or need help with a model, send your questions and models to support@cadalog-inc.com. If the model is too big to post or e-mail upload it here: https://www.box.net/drop/Podium16/15e2926ed9

Arjan2912
Registered: Nov 06, 2009
Posts: 5

Nov 07, 2009 at 05:08 AM

Im using a Core(TM)2 Quad CPU Q6600 @ 2,40 GHz with 3327 MB Ram.
(but i think my graphic memory is nog enough, can this be a reason to bugsplatt??)

Render Critic
Registered: Dec 04, 2006
Posts: 2,662

Nov 07, 2009 at 07:45 AM

Your machine seems plenty fast enough for general scenes, but this one is clearly very demanding

The video card is important for SketchUp but irrelevant to Podium.

Have you run the Podium wizard? It could be that there are lots of lights and/or reflective surfaces.

Your English is fine by the way. Believe it or not it is better than some native speakers

It will be interesting to see how much better 64 bit Windows 7 is

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Some have been thought brave because they were afraid to run away.
Thomas Fuller (1608 - 1661)

Arjan2912
Registered: Nov 06, 2009
Posts: 5

Nov 07, 2009 at 03:39 PM

#10

Thanks again for these replies, but i still don't understand why i get a bugsplat everytime i try to render a large image, the renders posted back at this forum are much better as what i get out after rendering. ( i thought it had something to do with my graphic memory)
So if anyone has got a suggestion how i can make my renders work i'll be really happy.
(and i'll keep improving my podium skills (im only using it for 3 weeks), and i hope i can help you guys out when i finally master it ;-))

Render Critic
Registered: Dec 04, 2006
Posts: 2,662

Nov 08, 2009 at 05:45 AM

#11

It sounds like a simple matter of running out of memory for large and complex scenes. The larger the rendered image, the more data needs to be processed and therefore held in memory.

The more complex your scene, the more processing is required, and the more data needs to be stored while processing. So if you have lots of lights and reflective surfaces, the engine has to determine what happens when light bounces off reflective surfaces onto other reflective surfaces. Curved reflective textured surfaces are obviously more complex again. In order to calculate these effects, the engine needs to hold a large amount of data in memory. The larger your texture images, the more memory will be required.

The Podium wizard will tell you a little more about the complexity of your scene in terms of lights and reflective surfaces. If you know you have some huge texture maps, try to reduce the size.

__________________
Some have been thought brave because they were afraid to run away.
Thomas Fuller (1608 - 1661)

Arjan2912
Registered: Nov 06, 2009
Posts: 5

Nov 08, 2009 at 08:41 AM

#12

Hi Guys, thanks for explaining.
Last night i thought about a solution and found it.
I installed Sketch up and podium on my laptop. (much slower but with more graphic memory) and guess what happend.
It rendered all my images beautifully, so i start to think my old graphics card had to do something with the bugsplatt.
It takes a lot longer to render, but i can do other things on my desktop wile the laptop is doing the rendering.

Thanks agian for all your replies, and quick help. i start to learn a lot faster since i read the differtent posts about tips, trics, etc, etc.
An like i said before, when i get better at this hole rendering thing, i'll try to think with you about other peoples questions.
(and its good for my english too;-))

sepo

Forum Master
Moderator
Registered: Nov 03, 2006
Posts: 3,703

Nov 08, 2009 at 08:48 AM

#13

Glad you found the workaround.

Render Critic
Registered: Dec 04, 2006
Posts: 2,662

Nov 08, 2009 at 01:24 PM