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Vray rendering file size limits again.
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Vray rendering file size limits again. // Archive: Tech Forum
Post by Changa // Jun 9, 2007, 5:13am
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Changa
Total Posts: 187
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Hi everybody,
Just installed TS7.5 yesterday and can tell that it became faster (at least while loading and exit).
I am sorry to return to the old and painful story – Vray rendered file size:( . Last Prodigy’s thread about this ended with a theoretical conclusion, that are no limits but the memory size, and 2 GB is more than enough for 4000 x 4000 rendering and bigger. I need ‘bigger’ in most cases, because my architectural renderings go to billboards ~ 2x3 meters and customers want to print them with 300! dpi. (do not know why;) ). Yesterday I tried Vray 1.5 to render to 6000 x 4000 PSD file with AA from the Model side. First of all no PhotoShop options menu was offered. It’s just missing. Rendering starts immediately after the main render to file dialog. The same thing happens in my Ts7.1 What do I do wrong? Should I go to LE?:D And secondly and most pity that maximum size that I (or TS ?) can render was 3200 x 2400. Memory usage before rendering – 511 MB (TS7.1 takes 800 MB for the same scene), during rendering - 1,2 GB. Around 2.8 GB is free as far as my dual Xeon has 4 GB RAM. All tries with bigger file sizes finished with Vray rendering command failed message at the beginning (just in a few seconds I pressed OK to start. Memory usage at this failure ~ 800 MB). It is step forward compared with Ts 7.1 which spends hours for such large files rendering with 0 bytes file as a result. Is it happens to me only, or someone with lot of RAM, faces this problem as well? To stop at the very beginning opinions that this is my particular machine bug I can tell that the same was on my old 3.2 Pentium with 2GB RAM.
I really need recommendations from Caligari team who can trace this problem from inside (I hope). I think Caligari worked much on 7.5 to improve memory consumption and can help to understand that is happening with large size rendering. |
Post by splinters // Jun 9, 2007, 6:08am
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splinters
Total Posts: 4148
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On a similar note (but a tenuous one) Vray crashed my laptop yesterday. I was partially amazed that I could actually run Vray with 256mb Ram (32mb of it shared with the graphics, but equally amazed that the laptop simply made a funny sound then crashed out completely...not even a restart, just a black screen.
I didn't post it as the laptop really is a piece of c**p and just good enough to type a few school reports on. However, a warning might have been nice..I recreated 3 times before I decided to give up. And the scene, it was the little boy with the could in the Little Cloud thread.
oh well...:o
Regarding your problem, I am not aware of any support for PSD format in Vray....YET.
Perhaps it is a future feature...maybe alongside tS7.6 |
Post by Changa // Jun 9, 2007, 7:56am
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Changa
Total Posts: 187
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Thanks Splinters,
After your post I decided to try with PSD and LW. The PSD options menu exist in LW redndering! Can tell you more - PSD format is supported by Vray but without any options. Just all in 1 PS layer.
Fortunately it was no crashes while large size rendering, but on the contrary after this Vray rendering command failed message not possible to exit TS! The only way is to END TASK in Win Task Manager! Forgot to tell that Vray does not want to render even simplest scenes (spere and two cubes) to large size file, and often holds all the memory which was used in rendering until you restart TS. |
Post by splinters // Jun 9, 2007, 9:27am
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splinters
Total Posts: 4148
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Yup, good PSD support has been there since ipak and then 7.0 but only for lightworks.
Given the power of Vray it would be good to see the same support for PSD layers as well. I demonstrated a simple use of this in the manual (with the Harold Family image) and could really do with the same for Vray in my current 'cloud' project. Would be great if Caligari announced it for Vray 1.6...:D |
Post by Changa // Jun 10, 2007, 7:39am
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Changa
Total Posts: 187
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Playing with Vray .tga output sizes I found that the difference in RAM consumption between 800x600 (480000 pixels) and 4000x3000 (12,000,000 pixels) rendering is 360 MB (910MB and 1.27GB) or 1.4 time although difference in size is 25 times. Following these figures, if I have another 1.1 GB of free RAM (from 910MB up to 2GB) I can enlarge output up to ~75 times from 800x600 or up to 6960x5220. Is it maximum limit? Not too much. But what limit me at 4000x3000 points in this case? Memory fragmentation?:confused: |
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