Logo by mauxuam - Contribute your own Logo!

END OF AN ERA, FRACTALFORUMS.COM IS CONTINUED ON FRACTALFORUMS.ORG

it was a great time but no longer maintainable by c.Kleinhuis contact him for any data retrieval,
thanks and see you perhaps in 10 years again

this forum will stay online for reference
News: Did you know ? you can use LaTex inside Postings on fractalforums.com!
 
Home Help Search Gallery Downloads Login Register
*
Welcome, Guest. Please login or register. October 02, 2018, 03:21:55 PM


Login with username, password and session length


The All New FractalForums is now in Public Beta Testing! Visit FractalForums.org and check it out!


Welcome to Fractal Forums > Fractal Software > 3D Fractal Generation > Mandelbulber > Failed DE over 2900 % - what am I doing wrong
Pages: [1]   Go Down
« previous next »
  Print  
Share this topic on DiggShare this topic on FacebookShare this topic on GoogleShare this topic on RedditShare this topic on StumbleUponShare this topic on Twitter
Author Topic: Failed DE over 2900 % - what am I doing wrong  (Read 1751 times)
0 Members and 1 Guest are viewing this topic.
darksky
Guest
« on: September 20, 2011, 01:28:00 AM »
Here is my config: http://pastebin.com/drcrxdgU

I can't understand what I'm doing wrong.  The above is my first attempt at a keyframe animation.  It starts out okay, but as I zoom in, I get increasing values of Failed DE.  I thought by optimizing the DE step factor, I would avoid this.  Thanks in advance.

Starting image:  http://postimage.org/image/2fzblmc3o/
Middle image:  http://postimage.org/image/2fzewp138/
Logged
taurus
Fractal Supremo
*****
Posts: 1175



profile.php?id=1339106810 @taurus_arts_66
WWW
« Reply #1 on: September 21, 2011, 09:55:57 AM »
hi darksky and welcome to the forums.  howdy

i think you did nothing wrong. while i don't know what DE error means, i see this value often in absurd heights (what the hell is 2000% ?). i ignore this, as i never encountered any quality loss.
the important value in this row is missed DE. this is the value affected by the optimisation and it should allways be lower than 1% at least (better is 0,10%).

have fun!
taurus
Logged
when life offers you a lemon, get yourself some salt and tequila!
Buddhi
Fractal Iambus
***
Posts: 895



WWW
« Reply #2 on: September 21, 2011, 06:23:19 PM »
Quote from: taurus66 on September 21, 2011, 09:55:57 AM
hi darksky and welcome to the forums.  howdy

i think you did nothing wrong. while i don't know what DE error means, i see this value often in absurd heights (what the hell is 2000% ?). i ignore this, as i never encountered any quality loss.
the important value in this row is missed DE. this is the value affected by the optimisation and it should allways be lower than 1% at least (better is 0,10%).

have fun!
taurus


I have just realized that there is some small bug in the program. This value "DE error" in console window shouldn't be given in percent. This is total number of pixels where was overstepping problem caused by wrong distance estimation. The value "MissedDE" on progress bar is calculated in the same way (but properly), but this is percentage of pixels with overstepping problems.
When there is high value of "MissedDE", there is a lot of noise on image (many black pixels, high roughness of surface or missed some parts of fractal). To reduce this problem sometimes is needed to decrease "DE step factor" (not too much because rendering will be very slow).
Logged
My fractal gallery: http://krzysztofmarczak.deviantart.com
fractal animations: http://www.youtube.com/user/xlace
Mandelbulber program: https://github.com/buddhi1980/mandelbulber2
darksky
Guest
« Reply #3 on: September 22, 2011, 01:45:16 AM »
Thanks for the replies, all.  I'm glad to try the new setting.  As you can see in screenshot #2, there is a lot of noise in the images.  I will try the setting you suggested!
Logged
darksky
Guest
« Reply #4 on: September 23, 2011, 03:21:38 AM »
Quote from: taurus66 on September 21, 2011, 09:55:57 AM
the important value in this row is missed DE. this is the value affected by the optimisation and it should allways be lower than 1% at least (better is 0,10%)

If there is no mention of this parameter in the output should I assume that I am not missing any?

Code:
$ mandelbulber -keyframe -start 2 -end 3 -format jpg ~/.mandelbulber/settings/try1
Log file: /home/facade/.mandelbulber_log.txt
commandline: keyframe mode
commandline: start frame = 2
commandline: end frame = 3
commandline: JPG image format
commandline: settings file: /home/facade/.mandelbulber/settings/try1
noGUI mode
Detected 4 CPUs
Memory allocated
g_thread supported
Default data directory: /home/facade/.mandelbulber
Undo status: count=98, last=2589, level=2589
Memory for image: 52 MB
Memory for image reallocated
Lights placed
Found 45 keyframes
Keyframes loaded
************ Rendering frames *************
---------- index: 2 -------------
Distance = 1.941471e-01
alfa = 0.530733, beta = 0.273651
x = 0.72582955, y = -0.54288289, z = -1.05151088
Average N = 11.679192, Average DE steps = 2158.666602, Failed DE = 32889%  
Done 100.000%, to go = 0h0m0s, elapsed = 0h1m59s, iters/s = 18557398       
Image saved: images/image00002.jpg
Rendering finished

Also, I still have black dots all over my image, even with a DE Step of 0.08 which is what the HQ optimizer suggested.

http://postimage.org/image/fmxewrno/
Logged
taurus
Fractal Supremo
*****
Posts: 1175



profile.php?id=1339106810 @taurus_arts_66
WWW
« Reply #5 on: September 23, 2011, 02:12:47 PM »
the "missed DE" value is located at the progress bar of the main window. "Failed DE = 32889%" should mean almost 33000 pixels failed for distance estimation (see buddhi below). depending on size of image this might be a few percent. the optim. buttons do not allways work propper, so i suggest to decrease DE step further. try for instance 0.02 and watch the progress bar...
you might also post the entire params here easily with the copy/paste button.

good luck!
taurus
Logged
when life offers you a lemon, get yourself some salt and tequila!
Buddhi
Fractal Iambus
***
Posts: 895



WWW
« Reply #6 on: September 23, 2011, 05:22:04 PM »
Quote from: darksky on September 23, 2011, 03:21:38 AM
Quote from: taurus66 on September 21, 2011, 09:55:57 AM
the important value in this row is missed DE. this is the value affected by the optimisation and it should allways be lower than 1% at least (better is 0,10%)

If there is no mention of this parameter in the output should I assume that I am not missing any?
Also, I still have black dots all over my image, even with a DE Step of 0.08 which is what the HQ optimizer suggested.

http://postimage.org/image/fmxewrno/

It's because this formula is generally difficult to render. There is no accurate distance estimation for this formula in Julia mode, so ray-tracing is not accurate. There is no way to make this better.
Logged
My fractal gallery: http://krzysztofmarczak.deviantart.com
fractal animations: http://www.youtube.com/user/xlace
Mandelbulber program: https://github.com/buddhi1980/mandelbulber2
Pages: [1]   Go Down
« previous next »
  Print  
« previous next »
 
Jump to:  

Related Topics
Subject Started by Replies Views Last post
failed db move... Fractal Forums News cKleinhuis 12 1830 Last post August 01, 2011, 06:52:10 PM
by cKleinhuis
Big Render bug - wrong colors Mandelbulb 3d mondaymorninglunatic 14 1830 Last post September 10, 2011, 10:48:09 AM
by mondaymorninglunatic
What is wrong with this image? Mandelbulb 3d Jino 3 583 Last post June 01, 2012, 02:47:16 PM
by lenord
Failed to load texture Fragmentarium cyberxaos 6 1069 Last post December 05, 2012, 12:05:05 AM
by cyberxaos
Snowball Prank Gone Wrong - 3D Animation Animations Showcase (Rate My short Animation) PunishableAnimations 1 264 Last post January 09, 2016, 12:48:59 AM
by cKleinhuis

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines

Valid XHTML 1.0! Valid CSS! Dilber MC Theme by HarzeM
Page created in 0.517 seconds with 25 queries. (Pretty URLs adds 0.019s, 2q)