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Welcome to Fractal Forums > Fractal Software > 3D Fractal Generation > True 3D mandelbrot type fractal
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Author Topic: True 3D mandelbrot type fractal  (Read 610868 times)
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David Makin
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« Reply #240 on: September 26, 2009, 12:00:44 PM »
Awesome render Thomas - is that using the Monte Carlo methods that you mentioned for the light casting ?
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lycium
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« Reply #241 on: September 26, 2009, 12:06:59 PM »
yup. i've been reading http://graphics.stanford.edu/papers/veach_thesis/ again lately, it's the bible of monte carlo image synthesis smiley
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bugman
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« Reply #242 on: September 26, 2009, 04:16:03 PM »
Very cool. I expect your renderings will blow us all out of the water. How long did this render take and how many samples per pixel? Are you using an efficient distance estimator like David Makin's? What constant did you use?
« Last Edit: September 26, 2009, 04:25:13 PM by bugman » Logged
twinbee
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« Reply #243 on: September 26, 2009, 05:22:19 PM »
Ace stuff, lycium. Like a 3D-shaped snowflake if you could ever get such a thing. GI seems to reveal more detail by brightening inside areas, i.e. nooks and crannies.

Any chance of an inside shot of the mandelbulb?
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David Makin
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« Reply #244 on: September 26, 2009, 06:55:42 PM »
Hi all, I just corrected and optimised the original code I posted for the "delta" DE method:

http://www.fractalforums.com/3d-fractal-generation/true-3d-mandlebrot-type-fractal/msg7812/#msg7812
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David Makin
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« Reply #245 on: September 27, 2009, 12:14:15 PM »
Hi, finally got around to taking a copy of my 3D IFS formula and changing it from escape-time IFS to standard escape-time.

First result:

http://makinmagic.deviantart.com/art/True-3D-Degree-7-Two-lights-138388564

If you compare it to the earlier render (also in my scraps on DA) you'll see the increased sense of perspective gained from using the extra light source and including a specular component.

Will be adding code for shadows today smiley

When I finally get around to writing the class-based raytracing suite in earnest I will be including options for global illumination methods.
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The meaning and purpose of life is to give life purpose and meaning.

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David Makin
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« Reply #246 on: September 27, 2009, 08:02:36 PM »
Exactly the same image but with shadows (at last), @2560*2560 took 1hour 43mins on this 3GHz P4HT running in hyperthreaded mode at around 2GHz (just 21mins extra for shadowcasting).



If no image above then go here:

http://makinmagic.deviantart.com/art/True-3D-Deg7-2lights-Shadows-138430287
« Last Edit: September 27, 2009, 11:57:25 PM by David Makin » Logged
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twinbee
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« Reply #247 on: September 27, 2009, 10:59:00 PM »
Wow, a true behemoth. This is the best pic yet of the whole thing, and it's so much nicer with shadows too.
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stigomaster
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« Reply #248 on: September 27, 2009, 11:27:12 PM »
That is where I am going to live! There can't be a more beautiful location anywhere.
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David Makin
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« Reply #249 on: September 27, 2009, 11:52:40 PM »
Quote from: stigomaster on September 27, 2009, 11:27:12 PM
That is where I am going to live! There can't be a more beautiful location anywhere.

Actually I suspect the degree 4 may be even more aesthetically pleasing - at least in close-up smiley


All please note that I have some speed optimisations and improvements to do as to get the two renders I just posted there are actually 5 rays being cast per pixel just to get an accurate surface normal and at the moment it's just doing a full trace for each whereas it shouild be possible to do a full trace for the centre ray and limited ray-segment traces for the 4 adjacent rays - also I still have the issue of the dark outlines in areas of overlap and I want a better way of getting the "connectedness" i.e. to decide when an adjacent point should actually be used in the normal calculation.
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lycium
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« Reply #250 on: September 28, 2009, 06:08:01 AM »
david that latest render of yours is really nice and clean, visualises the structure well smiley also i agree about low degrees looking better close-up, the higher degree ones tend to display mainly periodicity of what's there in the low degree fractals.

i replied to paul's question about the constant used in email, it's from wikipedia: c = -0.8x + 0.156y

twinbee, i'm looking forward to rendering more images of these fractals, but first i need to get my pc sorted. got a quote on new pc parts and servicing today, once they get an appropriately massive heatsink in stock for the i7 i'll get cooking on those zooms smiley

finally, i've taken a week's leave from wednesday to work on fractal stuff!  afro
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twinbee
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« Reply #251 on: September 28, 2009, 04:29:45 PM »
The "Mandelbulb Garden" pic is a zoom into my earlier broccoli one, and the "Ice Plateau Cross" below it is a section to the left of my previous mountain pic.

For those new to this thread, both of them are zooms into David's 'behemoth object' pic above cheesy

"Mandelbulb Garden"

(bigger size)

"Ice Plateau Cross"


I've asked Karl if he can help simplify the algorithm like he did before (to remove the sin/cos stuff) - the extra speed boost would be so welcome...
« Last Edit: November 14, 2009, 09:39:39 AM by twinbee » Logged
bugman
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« Reply #252 on: September 29, 2009, 12:11:44 AM »
Here's an animated 4th order Julia set with GI:
http://bugman123.com/Hypercomplex/Julia-White4.m1v
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David Makin
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« Reply #253 on: September 29, 2009, 12:51:51 AM »
Quote from: bib on June 09, 2009, 11:53:10 AM
You guys are totally crazy! What is more useless than a 3D brot? I love that smiley

Craziness can produce amazing results:

http://www.fractalforums.com/3d-fractal-generation/true-3d-mandlebrot-type-fractal/msg8090/#msg8090
http://www.fractalforums.com/3d-fractal-generation/true-3d-mandlebrot-type-fractal/msg8082/#msg8082
http://www.fractalforums.com/3d-fractal-generation/true-3d-mandlebrot-type-fractal/msg8075/#msg8075
http://www.fractalforums.com/3d-fractal-generation/true-3d-mandlebrot-type-fractal/msg7737/#msg7737

On the subject of crazy. I just found a great anagram of "David Makin" ---> "Via mad kind". Most appropriate cheesy
« Last Edit: September 29, 2009, 12:54:45 AM by David Makin » Logged
The meaning and purpose of life is to give life purpose and meaning.

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lycium
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« Reply #254 on: September 29, 2009, 04:18:28 AM »
phoar paul, that animation is awesome! i'd really like to do some animations of interpolating parameters too, but my rendering system is crazy slow... maybe when i get a new gpu or larrabee or something wink
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