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Author Topic: Rot Box formulas  (Read 2581 times)
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The Rev
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« on: December 20, 2010, 08:31:09 PM »

I've been experimenting with rotated mandelboxes lately (especially negatively scaled boxes) and I was wondering what formulas tend to work best for bringing out waves, spirals, etc?  I've been having better results with scalings between -1.3 and -2, with lower rotation numbers (-30 to 30 or so).  I tend to get more waves and mushroom-like shapes in the surface distortions with those numbers, but have yet to pull any good spirals or other shapes/textures out of them.

What kinds of formulas do you like to work with for best results?

Thanks,

The Rev
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Buddhi
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« Reply #1 on: December 20, 2010, 09:34:31 PM »

Try scale from range -1.2 to -1.1 and lower rotation angles (between 1 and 5 degrees). For good effects you need high zooms.
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Madman
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« Reply #2 on: December 20, 2010, 09:46:39 PM »

Let's try again... I just wrote heaps of "good" advice and then pressed a wrong button somewhere so, all's gone  angry

Most of the time I just stumble across something I like and go on from there. I find that if I try to look for a specific shape, I tend to miss the beauty that's in a certain set of parameters, just because I'm not looking for it. If your looking for spirals though, your best bet would be in the middle of the edge of a cube (I know that bib told me this in another thread, but I can't find it anymore...). I've never used one of those though, but rather the ones that just turned up somewhere else where I wasn't looking for them grin

Until now I probably haven't helped you a whole lot, so I'll stop rambling and tell you where I like to explore. First, my mandelboxes tend to have a scale between -1 and -1.3. I do try lower values from time to time, but I find myself ending up in this range most of the time. They seem to have a more "organic" feel in this range, and that's something I like. I would call the rotations you mention large. I do occasionally use a rotation of +/- 30 degrees around max one axis, but in most cases I keep |_rotate| < 20 ░.

These values alone give you a good starting point. Then it's time to explore. Sometimes you'll have to zoom in pretty deep before you find something, and since there are lots of areas to zoom into, you do need some patience... Especially if you go closer to -1, rendering takes longer, because you have to increase the maximum number of iterations.

Hope this gives you some insight in my way of thinking / exploring and maybe helps you a little in your effort

P.S: Just saw that while I was typing, Buddhi already posted a reply, which says the same in a lot less words. I'm gonna post this one anyway, since it took me long enough to write it!
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bib
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« Reply #3 on: December 20, 2010, 11:29:37 PM »

Agreed with what has been said by Buddhi and Madman. In fact spirals can be everywhere, like in this animation that you probably have seen already, and where you can see the whole cube in the middle of the video.

<a href="http://www.youtube.com/v/BjDpQ15iKUI&rel=1&fs=1&hd=1" target="_blank">http://www.youtube.com/v/BjDpQ15iKUI&rel=1&fs=1&hd=1</a>

Spirals are often hidden deep in a little outgrowth or at the edge of a large outgrowth.

If you're using M3D I would also advise to use AboxVaryScale instead of Amazing Box, because it offers more parameters to tweak.

I tend to reduce Min R from the default 0.5 value, set small values for scale vary (either positive or negative) and I like also to increase the default Fold value of 1, which can lead to spirals that "grow" instead of spirals that "plunge". Again, this is purely experimental! What is important for you is that you like what you do, and for the community, that you also find new ideas of formula combinations wink

A suggestion: why don't you try explore combinations of AboxVaryScale, _Rotate, IdesFormula, _Flips ? Try some Julias as well, if you like symmetries cheesy
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Between order and disorder reigns a delicious moment. (Paul ValÚry)
bib
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« Reply #4 on: December 20, 2010, 11:42:47 PM »

And have a look at my comment here: http://www.fractalforums.com/index.php?action=gallery;sa=view;id=4806

Sometimes the global shape looks very very weird, but when you explore it carefully you can find little wonders.
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Between order and disorder reigns a delicious moment. (Paul ValÚry)
The Rev
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« Reply #5 on: December 21, 2010, 12:16:15 AM »

Wow!  I appreciate all the responses.  I do have a question, tho.  I don't have AboxVaryScale, IdesFormula, or _Flips.  Are they in the latest version of M3D?  I haven't installed it yet because I have a long-term animation render in progress and Jesse said something about colors being interpreted differently in the new version.

Anyway, again, thanks very much!  I really appreciate it, and look forward to sharing an image or two soon. cheesy

The Rev
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lenord
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« Reply #6 on: December 21, 2010, 03:34:47 AM »

Those formulas are at the end of the first post in this thread by Jesse
http://www.fractalforums.com/mandelbulb-3d/formula-update/
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Power 8
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« Reply #7 on: December 21, 2010, 01:37:13 PM »

Incredible images and shapes  found in these rotboxes !
I agree with all above advice, low negative scales between -1 and -2, low min R , not too high rotation values,  and  just to add that tweaking the "fold " parameter has a lot of effect. I'm finding many strange shapes with fold around 1.00n .  (for example 1.005 , 1.003 ).
Also interesting is adding the translate formula on a third tab in the hybridation.
Happy Renders and Merry Xmas
« Last Edit: March 30, 2011, 08:19:31 PM by Power 8 » Logged
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