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Sketchup Magazine February 2014

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Rendering Optimization in VRAY Sketchup

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 Facebookpage "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

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

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

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

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.

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

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".

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

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

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

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.

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

Enter the value 0.45.45 ( 1.0 divided by 2.2)

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

Here it is..

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

I hope this is useful!

Nomeradona

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