ML / RAM

ML / RAM#276263

By Stinkie7000 - Fri Jul 18, 2008 8:28 pm

- Fri Jul 18, 2008 8:28 pm #276263

Does anyone know how much MutliLight affects RAM usage? I have plenty of RAM, but I'm wondering nonetheless.

Is there a formula or something?

#276279

By naikku - Sat Jul 19, 2008 12:22 am

- Sat Jul 19, 2008 12:22 am #276279

YEs this sunday there will be a formula.
Go Kimi Go!

Sorry, offtopic..
I have 2gb of ram and I like to use ML also. I´m thinking about upping
to 6gb and buying the XP64. I dont have any idea how much it takes ram.
Anyway, ML rules. The best thing in ML is that you can make an animation of just one rendering.

#276281

By Maximus3D - Sat Jul 19, 2008 12:31 am

- Sat Jul 19, 2008 12:31 am #276281

If i can make a guess i think one multilight enabled lightsource equals about one full rendered frame as i think it blends between each full frame image when you adjust the multilight sliders up and down.

This can be pretty ram consuming, especially with higher resolution renderings as it needs to have enough free ram for all buffers to be able to blend between them.

This is my guess, but as always i can be completly wrong.

it happend before.

/ Max

http://www.fotografmagnus.se/
https://www.facebook.com/FotografMagnusRonnkvist

#276288

By polynurb - Sat Jul 19, 2008 2:27 am

- Sat Jul 19, 2008 2:27 am #276288

..and when you render in coop mode, make sure there is enough ram free for the merging process, as mxcl will not clear the ram untill it is closed or a new task is assigned.
Happened to me once - ML rendered at the edge of 4gb mem usage... rendered fine but crashed during merging. (wonder if SSD disks would help here)
.. but I see Stinkie.. with 16Gb you have some freedom

workstation: EVGA SR-2 / dual x5650@3.5Ghz / quadro 4000

#276298

By Stinkie7000 - Sat Jul 19, 2008 8:35 am

- Sat Jul 19, 2008 8:35 am #276298

Yeah, that it does. But it's never enough, is it?

Hmmmm ... guess I'm gonna do some testing.

#276385

By dariolanza - Mon Jul 21, 2008 11:54 am

- Mon Jul 21, 2008 11:54 am #276385

Yes, Maximus3D is right.
To put ir t simply, an mxi with ML option on stores as many information as the sum of one render per light in you scene, just to allow you to mix them all as you can do in a compositing program.
So, this is a good aproximation to assume that a two lights scene consumes twice the memory as a scene with just one light. It's not exactly this way, but it represents a good aproximation.

Regards

Dario

Next Limit Team

#276392

By Stinkie7000 - Mon Jul 21, 2008 1:35 pm

- Mon Jul 21, 2008 1:35 pm #276392

Well ... that's basically what I thought/ feared.

#276410

By wimver - Mon Jul 21, 2008 7:35 pm

- Mon Jul 21, 2008 7:35 pm #276410

I can only share my experiences: I brought my 2 gig ram 8core mac to its knees with a 5000 x 5000 image with 3 ml. disabling one light or changing to 4500 x4500 brought the fire back to mxcl.
Will be upping to 4gig soon, that should give me plenty of space to tackle any rendering.

wim