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Author Topic: Mandelbulb3d v1.7.8  (Read 7417 times)
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Jesse
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« on: February 15, 2012, 10:38:52 PM »

Mandelbulb3d v1.7.8


http://www.fractalforums.com/index.php?action=downloads;sa=view;down=34


I have not encountered problems with this version, but because of a function that adjusts the thread priority while rendering, it seems more safe to me that this should be tested abit before i delete the older version.

Please read the textfile in the archive for a short documentation.

CAUTION:
USE ONLY SAME PROGRAM VERSIONS TO CONTINUE ANIMATIONS OR BIG RENDERINGS DUE TO COLOR OR LIGHTING CHANGES!
ALSO FORMULA UPDATES CAN CHANGE RENDERINGS!


Thanks and have fun!

What is new in version 1.7.8:
  -  Further bugfixes.
  -  Added DEcombinate methods to mix escapetime formulas with dIFS (see the
     new example parameters containing 'mix'.
  -  Now the ini-file is stored in the programs folder and the formulas are
     only read from the initial directory for formulas, so several programs
     stored in different folders can work independent from each other.
  -  Formula and a few parameter update.
  -  Stereo calculation reworked, should give more accurate results now.
  -  The slowest thread in calculations gets a higher priority to match
     calculation times better.  If this causes trouble select 'lowest'
     thread priority in the 'Internal' tab.
« Last Edit: February 15, 2012, 10:41:42 PM by Jesse » Logged
DarkBeam
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« Reply #1 on: February 16, 2012, 10:53:10 PM »

Very nice thanks Jesse cheesy
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Jesse
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« Reply #2 on: February 17, 2012, 12:18:46 AM »

And thanks for the plenty of inspirating formulas, the fuel for the program.  smiley
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KRAFTWERK
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WWW
« Reply #3 on: February 17, 2012, 09:41:37 AM »

Yes, thank you guys!!!  A Beer Cup

I never had the time to download 1.7.7. due to lots of renderings going on.
Downloaded 1.7.8. yesterday. Jeeeeesus, all those new dIFS formulas, do you two work around the clock with this?  afro
Had great fun with dIFS yesterday (had a day of from work) results will be posted soon.

Again, thank you for all the work you two put into this Jesse & Luca!

Johan
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ericr
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« Reply #4 on: February 17, 2012, 09:52:16 AM »

Jesse, thank you again for this sublime work





ERICR
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DarkBeam
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Fragments of the fractal -like the tip of it


« Reply #5 on: February 17, 2012, 08:32:43 PM »

Jesse I am noticing problems with de in some cases, with some kinds of surfaces

Some are rendered perfectly normally but weird stuff appears on higher iters. Do not know how in the world I can "fix" this... Sometimes a trick works;

"If DE < a value, return DE, else return sqrt(x*x+y*y+z*z)"

Sometimes it does not work neither... sad

And note that this screws up the dynfog... cry

Here an image, I am upping the formulas in my thread


* YUYU.JPG (104.4 KB, 626x851 - viewed 650 times.)
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DarkBeam
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Fragments of the fractal -like the tip of it


« Reply #6 on: February 17, 2012, 08:38:01 PM »

example of the bug:


Mandelbulb3Dv17{
W.....S....O/...7....2....UIHa4TdQj/.jq2I4NFO42E8eJ/d/d.ozPi8BnSSSssz2xx2zriiQyj
................................/vLcVOUpxz1........A./..................y.2.....
................/M.0/....6EJ1...e.....E2.....UB3Xa.37CqD/..........m/dkpXm1.OaNa
y.....kD12../..........wz..................................u1....y1...sD...../..
.w1...sD9ysz5EFWXx1..........GPdL1Ws..djztZH15db2uHF2fzDG6SLzs8o.qCYfYpDGWzFu.jS
6uXBLptvEiGKzm10tpX2WrpD......oZ..............kD.2....sD..kz....................
.............oAnAr1...sD....z.qRo4..sFP.UW5h/.ISo4.stFP..e5h/.mSo4......7....k1.
..................kz.wzzz1.U..6.P....M4...EB....W....k1....F....8/...I1.....SF52
...U.qFG9yzb2zzzRYoWzz7lz16.mc..zXCc..k18XGQeGyD.sIRhrVAkz1..........2.28.kFrA0.
.Ub96aAIVz9.1se7Umvxz0........../6U0.wzzz1................................E.0c..
zzzz.................................2U.8.kzzzD.................................
/6U0.wzzz1...................................2CcN/UvNP6.eeWCNq0.yRii.EJJUk1f..XR
S1.mx3CcN/UvNP6.QsLsUa3.ibhV..bTV1OK.sSq40.ly3CcN/UvNP6.MwLsUa3.ibhV.kqTV1OK.sSq
40.kz3CcN/UvNP6...EsUa3.eeWCNq0.IJ36wk8.wyLsUa3.................................
E....6....E.....I....U.....Hdp4QZFLG4B3.rJaQ..........................U1C....6..
..........kAnAnAnAnwz..........E.............................U.E........kz1.....
...wzcNaNaNaNazj................................................................
.....................2.....3....6.....pPgZbFjl4NhALShZYFH/......................
....4MU/0.......................................................................
.............E/EMo0FIhT67.2.....................................................
................................}
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DarkBeam
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Fragments of the fractal -like the tip of it


« Reply #7 on: February 17, 2012, 08:44:08 PM »

Uh, another buggy surface; CitrusIfs, has a nice aspect but on high iters it goes crazy (also the fog)

* CitrusIFS.m3f (1 KB - downloaded 162 times.)
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PhotoComix
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« Reply #8 on: February 17, 2012, 09:44:44 PM »

 Now M3D is even portable !! dancing banana sweet music dancing chilli love

Thank a lot Jesse is a amazing software !!
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Jesse
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« Reply #9 on: February 17, 2012, 09:50:58 PM »

Jesse I am noticing problems with de in some cases, with some kinds of surfaces

Some are rendered perfectly normally but weird stuff appears on higher iters. Do not know how in the world I can "fix" this...

Yes, there is an error in the DE calculation, it would also show up with only 1 iteration if you increase the DEstop value!
(Btw, that is a good test to avoid such things in future.)
Example:
Mandelbulb3Dv17{
X.....S....O/.../....2....UlFSVTWp4J.XJRQFrp7x6E9NYvSWKN0.gnyD6i7732.7USpl3RL5.E
................................iy6Y/BLOcy1........A./..................y.2.....
................/M.0/....2Uk....8.....E2.....EqaJ/fFUTvD/..........m/dkpXm1....6
//....kD12../..........wz..................................u1....y1...sD...../..
.w1...sDXqIDScniryn5.NLVavKSzebXe20tp0sDGsGWItOHgxfwsP1ItSVezoGuLx44uDvDaVuQJGJl
1yvW.hEubvygzaGRCxT3FbuD......I0..............kD.2....sD..kz0...................
.............oAnAr1...sD....zU3Sx8.yspf.MaLj0UXSx8.qupf.shLj0U/Tx8....../....k1.
..................kz.wzzz1.U..6.P....M4...UE....W....k1....F....8/...I1.....SF52
...U.qFG9yzb2zzzRYoWzz7lz16.mc..zXCc..k18XGQeGyD/sIRhrVAkz1..........2.28.kFrA0.
.Ub96aAIVz9.1se7Umvxz0........../6U0.wzzz1................................E.0c..
zzzz.................................2U.8.kzzzD.................................
/6U0.wzzz1...................................2CcN/UvNP6.eeWCNq0.yRii.EJJUk1f..XR
S1.mx3CcN/UvNP6.QsLsUa3.ibhV..bTV1OK.sSq40.ly3CcN/UvNP6.MwLsUa3.ibhV.kqTV1OK.sSq
40.kz3CcN/UvNP6...EsUa3.eeWCNq0.IJ36wk8.wyLsUa3.................................
E....2....E.....I....U.....Hdp4QZFLG4B3.rJaQ..........................U1C....6..
..........kAnAnAnAnwz..........E........kz1..................U.E........kz1.....
...wzcNaNaNaNazj................................................................
........................}


So the DE works only on low distances, on higher it gets worse, this is because you got the errors on higher iterations, because the DEstop gets bigger, relative to the object.

What exactly must be changed in the formula, i can't say yet.  Hope you find it.

Cheers! 
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DarkBeam
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« Reply #10 on: February 17, 2012, 11:23:28 PM »

I think he pretends all terms under square root; all those de work fine, others are crappy
I need to change the expressions to do this! Or it will never work
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Jesse
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« Reply #11 on: February 18, 2012, 12:04:29 AM »

Another way you can verify the DE:
in DEcomb-mode, the Zmid 2d calculation coloring shows the distance estimate!

It should be circles in repeated, equal distances, but this is how it looks for the LimpetIFS...
(press "Zmid" to show it)

Mandelbulb3Dv17{
X.....S....O/.../....2...............1.......s1E................................
................................OaNaNaNaty1........A./..................y.2.....
................/M.0/....2k7/...8.....E2.....QzIXLua2PuD/..........m/dkpXm1....U
z.....kD12../..........wz..................................u1....y1...sD...../..
.w1...sDYsAIxzzzjz1..........UAbUdisqcljMaO9c9iBOw1v41auWPX4zU2bVezzzzyDaoHzUvMS
3t17C1JzzzzvzeCphUisqclD......2/..............kD.2....sD....0...................
.............oAnAr1...sD....zU3SE9.ys/h.Ma5o0UXSE9.qu/h.sh5o0U/TE9....../....2..
..................kz.wzzz1.U..6.P....k1...EB....L....c3....F....8/...I1....UJl52
...U.eoZgzjdqZpz8R7vzPeRN/..0c..zzzz............/wyBIC4OWz1..........2k.8.kXWF1.
.sM93P58iz9.MmnWK2zwz0........../6U0.wzzz1................................E.0c..
zzzz.................................2U.8.kzzzD.................................
/6U0.wzzz1...................................QoFx0......jpUfEe4.tANU.6i4ve9G..gS
q/UIcEDul1kzE0A.QHHcJa7......EaEkyth......EMDBeH00......yj3MAZ2......cDOISPK....
..EaqVaek0.........U./0.zz/6FG1.yzHkqs/.xzZteKA.................................
E6...6....E.....I....U.....Hdp4QZFLG4B3.rJaQ..........................U1C....6..
..........kAnAnAnAnwz..........E........................................kz1.....
...wzcNaNaNaNazj................................................................
.....................2.....3....6....kIOh/LNoZYFH/..............................
.sU1....0............AnAnAnAnAzD..........2.....................................
...wz.........zDOaNaNaNatz9.....................................................
................................}
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Jesse
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« Reply #12 on: February 18, 2012, 12:21:47 PM »

The problem that produces those spikes in the DE might be...

R = sqrt(x*x+y*y)
DE = sqrt4(sqr(R2 + z*R + Rmul*R) + z*z) - R2

if z*R becomes negative so the term inside sqr() becomes zero, the DE is calculated only by sqrt4(z*z) ...
what makes such low values on bigger distances, does ...) + z*z*z*z) - R2 work?

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DarkBeam
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Fragments of the fractal -like the tip of it


« Reply #13 on: February 18, 2012, 01:02:15 PM »

The problem that produces those spikes in the DE might be...

R = sqrt(x*x+y*y)
DE = sqrt4(sqr(R2 + z*R + Rmul*R) + z*z) - R2

if z*R becomes negative so the term inside sqr() becomes zero, the DE is calculated only by sqrt4(z*z) ...
what makes such low values on bigger distances, does ...) + z*z*z*z) - R2 work?

Uhm, no grin sqr not sqrt smiley ...

sqr(a) = a*a

Thanks for the help. The problem is that I really don't know how to improve that formula because all terms are already under sqrt and there are no other ways to fix. When distance grows the field imho works as expected (or no?)
« Last Edit: February 18, 2012, 01:09:56 PM by DarkBeam » Logged

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DarkBeam
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Fragments of the fractal -like the tip of it


« Reply #14 on: February 18, 2012, 01:16:58 PM »

It should be circles in repeated, equal distances, but this is how it looks for the LimpetIFS...
(press "Zmid" to show it)

Now I am beginning to understand... But the expression is that, how can I think another working expression that is = 0 on the surface? undecided

Edit - don't worry about that, I'm trying to rewrite the expression now
« Last Edit: February 18, 2012, 01:23:40 PM by DarkBeam » Logged

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