easy rendering for Rhino in Windows
Accurate Colours
I find getting renders to accurately represent the material colours difficult. Blacks and greys in particular seem to change depending on the angle of the sun etc.
Any suggestions
Replies to This Discussion
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Permalink Reply by Scott Davidson on -
The change in color is the result of the tone operator working to get the lighting to the screen. Just as in a camera, depending on the time of day or the lighting setup in a studio. There will be shifting in how the colors look. This simpler the scene, the more pronounced the shift will be. Scenes that contain a lot of white or a lot of black and little else can also be difficult.
The shift is more often then not one of brightness. After rendering, use the brightness slider in adjust image to bring your colors into the correct range. You can also use Burn to adjust the white point. Saturation will help if you would like to bring more saturated color to the result.
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Permalink Reply by William Allison on -
Thanks Scott! Will give all that a try...
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Permalink Reply by William Allison on
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I'm still finding that I'm having trouble getting the colours to accurately display. As you can see in the attached, which I've sort of set up to accentuate the problem, this is a boat that is entirely made up of shades of grey and black.
Two things of particular note - you can't see anything of the interior, and no matter what I do, I don't seem to be able to cure this.
Also where looking through the slightly tinted glazing, it turns to black where the sky is the background.
Making things worse, I am trying to set up a basic animation, with a path around the boat, so whilst I can set the sun etc to more accurately show the colours, as the boat rotates, everything becomes very, very dark.....
Open to any and all suggestions!!
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Permalink Reply by William Allison on
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Here's part of a basic animation to show what I mean.
It's a bit jumpy because I didn't do a lot of frames in order to keep the file size down, but you can clearly see problems with overall light levels and the strange 'blackening' of the window areas. Also the sky goes a bit strange when you convert it into an avi....
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Permalink Reply by Scott Davidson on
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The dark light issues are due to the drastic difference between the bright side of the boat and the dark side of the boat. Also, the lack of indirect light is accentuating the problem. I might try Studio light setup with the Beach HDRI. Turn on Indirect light on the advanced tab. That will fill out the light from all sides of the boat. This should help.
When compressing to an AVi, there may be many colors removed to save space and speed up playback. Controlling the Video Codec and the compression is key to getting an image that does not lose too much quality.
For professional compression many people have used http://www.divx.com/.
Microsoft Video 1 codec is one of the best built in codecs. Since it is a native codec, you will not have to worry about playback issues on other peoples machines.
A free good quality codec is http://neuron2.net/www.math.berkeley.edu/benrg/huffyuv.html
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Permalink Reply by William Allison on
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and here's the file.....
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