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more natural effects - Wind!

Started by Nav, November 22, 2008, 07:28:50 am

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Nav

Ok so I consider worldmachine pretty much the best thing for the effects that it does..erosion etc. But something I saw in a nice Little Features video for a editor called Grome..was some nice wind effects for their terrain creation tool.  Most of my work are situated in snow topped high mountains and it would be a great feature to have an effect that could blow the snow around a little.  Ive included the link for this video but and this wind effect can be seen about half way though the video

http://www.quadsoftware.com/html/Editor/movie_features_terrain_creation.htm

tell me what you think..

Adam

nikita

You could add a gradient, run erosion, then subtract the gradient again for a kind of directed erosion. Maybe with one of the filters activated.
"Every time you read or write beyond the end of an array, somewhere a fairy dies."
Richard Buckland

nikita

See attachment for an implementation.  :)
"Every time you read or write beyond the end of an array, somewhere a fairy dies."
Richard Buckland

Nav

November 23, 2008, 06:53:33 am #3 Last Edit: November 23, 2008, 07:09:54 am by Nav
Yep thats a pretty good start to some nice wind effects Nikita:)  Because I work mainly with Dem's I included a version that uses Mt Cook in NZ.  I think that trying somehow to affect the direction or give slight turbulence around the mountain may help with the effect, if you look at the direction the erosion/wind is going you can see it looks good on one side of the mountain (the jpg) the other side looks a little unnatural.  I also think there would be a more build up of snow behind the rocks. 

fun
Adam
the .ter file
http://rapidshare.com/files/166612041/mt_cook.rar.html
http://www.2shared.com/file/4334198/4f2add51/mt_cook.html

Aero

You raise a good point, but I don't think World Machine should get a ton of new natural devices. It's strength has always been combining simple elements to grand effect. Like nikita said, stuff like directional wind erosion is already possible with the current tools, but I don't think many people would think that.

I'd say WM2 should come with more elaborate tutorials that would cover things like this. A huge step in the right direction was made in WM2, let's expand upon that with more specific tutorials. The crater tutorial is a good example of that. Back when I didn't know much about WM that tutorial was a real eye opener to what was possible.

Aero

As an example of my statement above: wow, I never would've thought of wind erosion this way. It works really well if the erosion settigns are high. Very cool!

Nav

sure there are a ton of effects that you can make with world machine..but would you say that you could create erosion without the erosion filter..snow maybe but not erosion.  I think wind is a special type of filter best represented as filter based on real wind effects in nature..the erosion using the gradient produces some nice effects and its close to representing wind in some ways..but its not really dong what wind would do, infact in some ways the erosion with the gradient is actually doing the opposite of what wind would be doing...If you consider snow or sand being blown around it has a tendency to build up on before obstacles..standard erosion isn't really doing this..if there is a standard way to achieve this then I'm all for it..but I wouldn't know how
ad

nikita

Quote from: Aero on December 03, 2008, 02:26:21 am
You raise a good point, but I don't think World Machine should get a ton of new natural devices. It's strength has always been combining simple elements to grand effect.

That is true and I'm a huge fan of explointing the devices that come with WM - but it shouldn't make us stop thinking about new useful devices IMO. :) Also, some effects just can't be done with the existing filters - or they call for a really large memory eating macro using many devices to achieve something that could be done better with a single line of code instead.

For example that accumulation we still need is hardly possible to do. I used the high pass macro and two lighting generators to create an accumulation mask but it just doesn't look natural.
But I admit that programming it wouldn't be trivial either.
Except if you do it the way grome does - that looks easy.

Come to think of it.. I think this can be emulated in World Machine...
*works something out*
See attachment.  It's no big improvement and you have to find the right combination of blur and sun-altitude, but maybe it can help in some of the cases were the solution above fails.
"Every time you read or write beyond the end of an array, somewhere a fairy dies."
Richard Buckland

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