del82

Using LSCAPE in wireframe display. There isnt realy that much of time boost.
Im asking this becuse Im getting next week 2 GB of ram for me that should be 3BG of RAM for Lightscape!
This will FLY!
Arnold, can LSnet also be used for processing?

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Arnold Gallardo

Well you should NOT be using LSCAPE for solution processing. Why? I has to update all the GUI and all the geometry WHILE the progressive refinement is doing the adaptive subdivisions. With LSRAD it only has to deal with fetching and storing luminance values as well as checking patch occlusions etc.

If you mean if the LSNET can break up or accelerate the .ls procesing the answer is NO. Progressive Refinement as implemnted in LVS cannot do that however, you can use the LSNET for FASTER raytracing using several computers. This is where it speeds up real quick.

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Arnold Gallardo
Visual Content Creator
Technical Writer

Author:'3D Lighting: History,Concepts
and Techniques'

del82

Ill do some test to see how much faster it is.
Arnold are you familiar with LSnet setup, have you ever used it?

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womble

I think what Ihab is trying to say is that your speed is being bottlenecked by your processor, and that adding more Ram won't do any good as your processor just isn't fast enough to access and make use of that additional ram.

But then i'm no hardware whiz, but I do know I'd definatly upgrade that processor before adding any more ram.

del82

As far as I know, the more RAM you have in LS the faster will processing be, no matter of your CPU speed wich is important for RayTracing.

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Arnold Gallardo

When you are talking about progressive refinement , yes more RAM means quick solution processing IF you have enough CPU speed. How fast the patches and elements are computed depends on the CPU but how fast the iteration from one patch to the next depends upon the RAM.

Yes I use LSNET del although not as much as before because I have gotten int the habit of using LSRAD so things have been fast although I have always been using Dual CPU server computers.

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Arnold Gallardo
Visual Content Creator
Technical Writer

Author:'3D Lighting: History,Concepts
and Techniques'

del82

So your saying, puting 1GB ram, for me, wouldnt speed up my processing in Lightscape anymore?
Im asking this couse when I added 512MB more to then present 512MB I cut down processing time in half.

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del82

Arnold, one question regarding LSnet,
if you have two computers in you network, can they work togeter on one image using LSnet?

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Arnold Gallardo

If you are talking about 'raytracing' phase yes, 'Solution processing' NO.

As for the RAm question go look at your stats when you process a .lp file. The denser your mesh resolution (suroface processing parameters) the more memory it needs to store that information. IF you have less ram than the solution file needs, your processing slows down because now you get into 'HD paging' instead of everything being held in RAM. Every patch, every element and every 'visible' surface' in your geometry needs to be stored for every ITERATION, this is why you need lots of RAM plus enough CPU power to speed up the computation. As you might know the radiosity information is stored in the vertices of each polygon.

As i said above once you have a limit on your FPU (floating point unit) capabilities based on your choice of CPU, the next limitation on the speed of your solution processing is your RAM and much more so if you keep using LSCAPE instead of LSRAD.

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Arnold Gallardo
Visual Content Creator
Technical Writer

Author:'3D Lighting: History,Concepts
and Techniques'

del82

Yesterday I made few tests , processing the solution inside of Lightscape and other one using eScape.
Results were Ls 13:50 min and eScape 12:30 min.
o.k. advantage is visible but its not that drastic.

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