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Thursday, 4 August 2011

Tutorial: How to render extra huge output image without crashing in Vray SketchUp

I have encountered these following questions "My client wanted me to print A0 size paper with nice quality, how can I do it?" Today I receive this from one of the follower with my Nomeradona Facebook page "Nomeradona, I am working on a Google SketchUp 3D Floor Plan, and trying to Render it in Vray. I am able to Render it at (800x600), but I run out of ram, when I tried to output the (4000x3000 dpi) file size. Are there any tricks you can recommend to reduce the file size or increase rendering optimization?"

In this case, what shall we do? The good news is there is a very simple solution in Vray Sketchup 1.49.01 and here is this using the output vrimage.

This is an old Sketchup file which I did almost four years ago. Let me just use it to quickly show you the trick




Step 1: The output size

I have rendered before more than 8000px width x 4000px spherical panorama render which I used for this Virtual reality post. CLICK HERE to view this post. So far this was the maximum size I have tried. Anyhow in this particular render, I will make an output of perhaps half of this.


Step 2: IR passes
Since the image is huge, you don't need that high min/max rate. I lowered my min/max rate to -5,-3 .


Step 3: VRImage output. 
Locate the output roll-out window and under the setting output, tick the box "Render to VRImage". Once selected save it in exr root file to any folder that you want.



Step 4: Preview Image. 
Vray SketchUp will now begin to write the data in your hardrive. The Vray frame buffer will appear and you will see on the very top it reads "preview of the file output size that you have entered".


Once done, the image file will be written to the assigned folder that you have chosen.




Open Photoshop and load the exr file

Step 5: Converting the Gamma 2.2 to Gamma1.0
Vray SU by default uses gamma 2.2. When we open the file in Photoshop you should not be surprise why it's too bright. In order to convert the Gamma 2.2 to 1.0, select image/ adjustments/exposure.





Enter the value 0.45.45 ( 1.0 divided by 2.2)




Here it is..




I hope this is useful!

Nomeradona



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19 comments:

  1. Anonymous11 August 2011 at 09:27

    how long was the redering compared without using the vrImage?^^, thnx to this sir...

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  2. Unknown8 September 2011 at 23:49

    i cant do the render then, because vray will crash. the reason why you have to use this is to avoid the crash.

    ReplyDelete
  3. xtianatix19 October 2011 at 15:40

    sir, what's the difference of rendering a smaller image first then saving the irradiance/light cache maps and then loading them for the larger image? thanks sir.

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  4. Unknown19 October 2011 at 15:51

    I do that often too. I calculate the passes in smaller output. then reload to the bigger one. It s actually an excellent thing to do.

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    Replies
    1. Unknown8 November 2012 at 19:30

      hai sir..plz tel me hw to save irradiance and light cache maps for making large out put?

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  5. Anonymous17 November 2011 at 00:48

    sir good day.. can i ask how to save the .exr image to jpeg file? any tricks? thanks in advance

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  6. Unknown17 November 2011 at 11:13

    use photoshop. go to mode and change the 32 bit to 8 bit.

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  7. Anonymous17 November 2011 at 21:37

    thanks for the answer sir nomer. one more question , do you have any plugins which is reducing the polygon counts? its because when i render my model it says "verify that you have enough space in your TEMP folder" i search in internet how to solve this problem and luckily i saw this link of yours on how to render huge image.. but the warning window is always popping up.. i already purge all the materials.but its always happening. i dont think my computer is the problem because i have a discrete processor and video card.. im using CORE i7 2600k the latest one and 6870 asus video card. and 8gb of memory. please help me sir :(

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  8. Unknown19 November 2011 at 22:34

    you there are alot of ways to optimize models. the first thing is to use 2nd party software like 3dmax or 3d deep exploration. You can also use the polygon cruncher. In sketchup Dale martens had develop Polyreducer script. I suggest you use it per component. meaning you have to optimize the component individually before importing the skp to the scene.

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  9. Unknown19 November 2011 at 22:36

    i just warn you that the script is still slow.

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  10. Unknown19 November 2011 at 22:37

    download link... http://forums.sketchucation.com/viewtopic.php?t=9789

    ReplyDelete
  11. Anonymous20 November 2011 at 16:38

    thanks alot sir nomer it helped me alot ..this was the output of my work.. http://www.facebook.com/photo.php?fbid=291273484228409&set=a.291273460895078.69434.100000372798816&type=3&theater
    thank you again sir. sa uulitin po.

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  12. Anonymous24 February 2012 at 08:13

    why is that when i render my sketchup model to VRI, my HDRI image i used in my model doesnt show in my PHOTOSHOP? i follwed every directions here. please help me. thank you

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  13. Anonymous20 March 2012 at 17:14

    Hi there. Really great tutorial. For the last friend, are you using a light portable photoshop version? Try opening the image with a full version that has more color profile options. I think the HDRI image will show.

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  14. Anonymous11 October 2012 at 19:01

    Frankly to say, I am still sucks at 3d modelling. I try some of your tutorials and those tutorials do fasten my works, at least now I can submit my presentation board with complete requirement. Thank you very much sir! But I still looks forward for new tutorials from you, the Great Sir Nomer :D

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  15. Unknown3 February 2013 at 11:03

    I keep getting Failed to Create Dump file when creating large images what do I do?

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    Replies
    1. Unknown4 February 2013 at 19:25

      Richard, is the TEMP folder full, then remove the files there. Another thing SKetchup is 32 bit image and VRAY is bounded by it. once all the memory is eaten up, it will crash. solution for rendering large image is this. alternatively use also the other trick of rendering it by parcel using the render region.

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