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thomas49th
Joined: 05 May 2008
Posts: 1
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 Posted: Mon May 05, 2008 6:16 am Post subject: Rendering clouds of large canvas (6ft by 2 ft) |
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Hi, im dealing with a massive canvas (6 foot by 2 foot). I want to render clouds on the background and have the same effect as it does on a image say about 640 by 480. However when i render clouds on a large resolution you lots of little clouds which looks horrible. The same goes with water paper. If you zoom into a small area you can see the clouds, but when viewing the whole image it doesn't look nice.
How do i get the big clouds on a big resolution rather than lots of little small clouds.
Thanks |
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Chenjesu
Joined: 23 Mar 2013
Posts: 4
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| Posted: Sat Mar 23, 2013 7:13 pm Post subject: |
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Hi thomos for 2 years I've been trying to find a solution and tried to develop fractalization formulas and worked with alien skin, but just today I had an idea and it works.
There's a precise mathematicaly reason, but the general idea is simply that you make a document x by x pixels, like say 1000 by 1000, BUT make it at something like 10-30 resolution. Then, render the clouds, then go to image -> Image Size and change the resolution back to 72, and it will blow it up with good results to something like 2700 by 2700. I think it multiplies by 72/30 or 72/(x resolution) or more generally ("o' original pixel size)*[("t" target resoluition) / (s starting resolution)] . o*(t/s) for short.
Hope this technique serves you well. |
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Chenjesu
Joined: 23 Mar 2013
Posts: 4
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| Posted: Wed Mar 27, 2013 12:24 pm Post subject: |
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Actually I just realized it isn't any different than simply enlarging the clouds, they are just rendered so well that they keep much detail. But there has to be some way to cram a bunch of pixels into a small canvas to trick photoshop into thinking it's a small 1000 by 1000 pixel canvas to render larger clouds so that you can unwrap or uncondense those pixels at 72 resolution to make it bigger. It uses a formula to generate the cloud information, and then transposes that information into pixels. So if the cloud information can just be used at a large scale it could translate it into pixels at something like 5000x5000. |
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