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Author Topic: Voxel image stack and then what?  (Read 39876 times)
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Rama
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« Reply #120 on: January 17, 2012, 11:45:57 PM »

I'm watching this forum for weeks now without signing up because I thought I have nothing to contribute anyway. Today I signed up because I found a repeatable procedure to create an OBJ file from PNG slices using Fiji (in my case Fiji 64). Before listing my mini tutorial I want to thank Jesse for creating Mandelbulb3D. It's amazing and I love it as much as XenoDream.

Here is my step by step tutorial:

1. Launch Fiji and select "File/Import/Image Sequence".
2. Select "1.png" to open the Sequence Options dialog.
3. In this dialog select additionally "Convert to RGB" and "Use virtual stack" and click OK.
4. Without doing anything else select "File/Save As/PGM". This creates a file with the extension "*.pnm". Accept the offered filename or change it if you want and save it.
5. Now select "File/Save As/Wavefront OBJ" and accept what's displayed in the Triangulate dialog. Wait till the second progress bar has closed in the Fiji status bar.
6. Click "File/Quit" to close Fiji. Strangely enough that's necessary to get the object file saved. Now you can import it into any 3D application that loads the OBJ format. I'm using for instance Vue 10 Infinite.

It would be cool if those slices would somewhat keep the original colors of the fractal to get a fully textured 3D object. However, it's already a huge step forward to be able to create objects at all.


In response to a pm I got on how I made the models in zbrush.
http://img338.imageshack.us/slideshow/webplayer.php?id=94294951.jpg
After the steps quoted above all I do is import the obj in zbrush.
Flip the normals or double side view in Tools properties.








I also like to run auto groups in polygroups to separate small useless parts and delete them.
Also playing with tools deformations is quite fun.
That's all folks !
« Last Edit: January 17, 2012, 11:50:05 PM by Rama, Reason: Forgot something » Logged
Don Whitaker
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« Reply #121 on: January 26, 2012, 08:54:12 PM »

I've posted a video tutorial showing the process from Voxel Stack, through Fiji, and into ZBrush or Meshlab. I use the method that Teena outlines above, but I skip the conversion to RGB images which saves some memory.

<a href="http://www.youtube.com/v/Kpu-DZs9HXU&rel=1&fs=1&hd=1" target="_blank">http://www.youtube.com/v/Kpu-DZs9HXU&rel=1&fs=1&hd=1</a>
« Last Edit: January 26, 2012, 11:19:43 PM by Don Whitaker » Logged

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bib
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« Reply #122 on: February 02, 2012, 11:38:01 PM »

Seems like this is generating interest outside of the fractal community grin

http://www.foundation3d.com/forums/showthread.php?p=218292
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Don Whitaker
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« Reply #123 on: February 03, 2012, 01:15:16 AM »

Seems like this is generating interest outside of the fractal community grin

I made a M3D convert amongst my game dev contacts on Google+ after he saw some of the shapes I'd created. He mentioned that he might be able to code something that would convert the stacks to a more standard format automatically. I'll keep folks updated if he makes progress.

These shapes are so compelling I'm sure we'll see them popping up all over the place soon. I'll think I'll go sign up for that Foundation3D forum and let em know about the Voxel Stack tutorial. I love seeing what people bring out of the Mandelbulb Multiverse. The more the merrier.  (^_^)
« Last Edit: February 03, 2012, 01:20:53 AM by Don Whitaker » Logged

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Teena
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« Reply #124 on: February 03, 2012, 08:32:43 AM »

This is really cool that more and more people use Mandelbulb3D. Your video tutorial is very helpful, Don! The first few times I tried your method I was disappointed because my objects looked as if I used a material with lots of transparent areas. Finally I realized that I used a much too low DE setting. I increase the setting and now I use only your method. cheesy
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Sockratease
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« Reply #125 on: February 05, 2012, 04:58:16 PM »

I said earlier that Hexagon, a great 3D Modeling Program, often goes on sale for $1.99 - and I'd post here when that happened.

Well...

It's on sale for the whole month of February, but it's not on sale for $1.99 - IT'S FREE!

I strongly recommend going to http://www.daz3d.com/i/3d-models/software?cat=1070 and grabbing that, and while you're there - BRYCE 7 PRO is ALSO FREE!  So is Daz Studio  Pro, a 3D Rendering package geared for the 3D Content they sell at Daz3D.  So people here may or may not want that one, but hey, it's Free!

This is the best price you'll see on these items  (Free)  (They ain't gonna pay you to take 'em!)  so Hurry Up!  February is a short month...
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Catelee2u
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« Reply #126 on: February 27, 2012, 01:15:14 AM »

Thanks Don very much for the videos. I really appreciate the level of detail you went into otherwise I wouldn't have been able to attempt this and especially doing it with free software. I've been experimenting with it and have managed to successfully create a couple of things though not necessarily perfect yet! I am making a more complicated DIFS one and had been experimenting with using lower numbers of slices. I made one of the image with 100 but there was a lot missing....upped to 300 and most is there so I went ahead but I'm going to redo with at least 500 because it's not good enough. I'm just very impatient and don't like having to wait for all the slices grin I did find it loads the object extremely large into Bryce3d but I guess that's good in some ways for creating landscape type pictures.




Thanks again!

I also seem to be getting loads of plain black images before and after the voxel images. I'm not sure why. It was late when I watched your videos maybe I missed something. I'll watch again.

I made my new picture....is on deviant art if anyone wants to see.

New thing I found out is fantastic!!!! On this website.... www.shapeways.com you can create an account and upload your models from Mandelbulb3d voxels and have them printed in 3d!!!! How fantastic is that?! There are several mandelbulbs and fractal pieces on there already and lots of unique sculptures.
« Last Edit: March 02, 2012, 05:56:56 PM by Catelee2u » Logged

cccp
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« Reply #127 on: April 11, 2012, 06:51:02 AM »

jesse, please add an anti aliasing option to the export, some progs like to have some in between value (grey), helps out smoothing, i can bypass by rendering out in higher rez and then rescaling but that leaves me with the z (picture count) being at least double in size and thus adding unnecessary geometry which has to be rescaled or i have to delete every n'th frame and then rename... its  hassle.

thx.
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slon_ru
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« Reply #128 on: April 11, 2012, 12:57:25 PM »

Hi cccp,
Try to use image "smooth" in Fiji.
http://www.fractalforums.com/index.php?action=gallery;sa=view;id=10767
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cccp
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« Reply #129 on: April 12, 2012, 11:30:09 PM »

Has anybody found any better solutions ?

As it is impossible to go beyond say a 1000^3 (depending on the object) since the obj file sizes become unmanageable. I tried to get higher image size and increasing the resampling factor to 3 but that gave just some scattered dots, anything beyond 2 is unworkable. So we are roughly stuck at 500^3 with a resampling factor of 1 and 1000^3 for a resampling factor of "2" and frankly "2" kills too much details for my taste, it is better to stick with "1"and slowly increase the z slices till u reach your limit. But the process is tedious one.

meshlab dies at anything bigger than 150mb correction can go higher, didnt have 64 bit version, figuring out now how high
and zbrush at 500.

I am at a loss, because in order to really get some nice fly through landscapes out of this we need higher mesh detail to generate displacement / normal maps.
This program is genius but to really make the magic happen there has to be a way to export more data or streamline the approach to give estimates of final file size, since 500 is painful but acceptable if then "stitched" together later on with continued 500mb chunks, like a panorama photo.

Ideas ?

PS: thanks to slon for the "smooth" tip
PPS: if u have a SSD drive there is no need to use virtual stack.
PPPS: i have a descent system, 2 months old, there are few that are better, so this isnt a hardware issue.
PPPPS: Jesse please, when saving a project, include the settings in the voxel export (offsets, scale, etc...)
« Last Edit: April 13, 2012, 12:10:46 AM by cccp » Logged
cccp
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« Reply #130 on: April 13, 2012, 06:18:26 PM »

ok had some success with 2000^3 got a 3gig file with 40 mil polys, meshlab managed it, gave it a quadric decimation to 5 mil, then HC laplacian.
Now have to figure out how to unwrap this monster, but the details are stunnig even though after reduction the poly count is the same as a 500^3 the difference is huge as it gets rid of the nasty stepping.

mind u it took about an hour for all these operations and all data had to be on my ssd sata 3 for swapping as it filled all my 32 gig ram to load it into meshlab.
and there i thought i would never use up my 32, should have gotten 64.

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Alef
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« Reply #131 on: April 16, 2012, 06:19:34 PM »

offtop:
Hi CCCP, I just like your name, and would go back to there for maybe few weeks.
p.s.
Just a nostalgia.
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slon_ru
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« Reply #132 on: April 24, 2012, 08:19:13 PM »

re:"be water my friend"  wink

voxelstack+realflow.
<a href="http://www.youtube.com/v/Q4c9-LRISsQ&rel=1&fs=1&hd=1" target="_blank">http://www.youtube.com/v/Q4c9-LRISsQ&rel=1&fs=1&hd=1</a>
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slon_ru
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« Reply #133 on: June 01, 2012, 04:13:03 PM »

it"s voxelstack too -
<a href="http://www.youtube.com/v/reCXsppsAfA&rel=1&fs=1&hd=1" target="_blank">http://www.youtube.com/v/reCXsppsAfA&rel=1&fs=1&hd=1</a>
smiley
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FracZky
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« Reply #134 on: July 12, 2012, 09:52:26 PM »

Any Help? I'm currently running the Mandelbulb1.799c testfile trying to export a "voxel" stack. But all I get is a blank screen...  undecided
I followed all the tutorials... but Voxel screen stays blank...??
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