(Problem) Netrender screen corruption?

  • 3 Replies
  • 339 Views

0 Members and 1 Guest are viewing this topic.

Offline SonicConstruction

  • *
  • Fractal Freshman
  • *
  • Posts: 6
« on: December 28, 2017, 03:56:17 PM »

Hi All

I have configured netrender in Mandelbulber 2.11-1 to use more than one machine, however when I do this there is some visible (tearing?) corruption in many of the output frames.
I am using machines of different type and number of cores. I couldn't see anything saying this would be a problem?

8 core Ryzen R7 1700 - Ubuntu 16.04
6 core Mac pro 2012 - Sierra

Whichever is the server the result is the same and its fine if I render on either machine in stand alone mode.

Has anyone had these kind of problems and is there something obviously silly I am doing? (I tried increasing the ray-marching step multiplier which didn't help)   :(

regards

Alan

Linkback: https://fractalforums.org/mandelbulber/14/netrender-screen-corruption/659/

Offline buddhi

  • *
  • Fractal Feline
  • **
  • Posts: 157
    • Mandelbulber GitHub repository
« Reply #1 on: December 28, 2017, 04:13:37 PM »
I'm not sure where exactly is the problem, but this frame which you showed was rendered at extremely low distance from fractal surface. It can produce significant numeric errors. As I see these two machines are completely different hardware platforms, so they can produce a little different output at limit of calculation accuracy (at 15th significant digit).

Do you observe similar problem on another frames, where distance is higher?

Offline SonicConstruction

  • *
  • Fractal Freshman
  • *
  • Posts: 6
« Reply #2 on: December 28, 2017, 04:32:26 PM »

thanks buddhi

I'm pretty new to this environment but yes, I think that was very close. Ill try with something further and reply here.

regards

Alan

Offline SonicConstruction

  • *
  • Fractal Freshman
  • *
  • Posts: 6
« Reply #3 on: December 28, 2017, 09:26:45 PM »

..yes that definitely makes a difference. guess I was too close on those frames  :fp:


xx
"Time Span"

Started by cricke49 on Fractal Image Gallery

0 Replies
708 Views
Last post August 02, 2018, 07:05:21 AM
by cricke49
xx
OpenGL font rendering

Started by sjhalayka on Programming

2 Replies
288 Views
Last post April 20, 2020, 05:00:47 PM
by sjhalayka
clip
A new style of fractal imagery using fractal neural style transfer

Started by iRyanBell on Fractal Image Gallery

3 Replies
478 Views
Last post October 03, 2020, 10:50:39 PM
by Jimw338
xx
MB3D - Refresh Navigator Screen

Started by Gyro789 on Noob's Corner

2 Replies
129 Views
Last post April 19, 2020, 09:36:33 AM
by Gyro789
xx
OpenCL Netrender: GPU/CPU

Started by greytery on Mandelbulber

6 Replies
689 Views
Last post June 08, 2019, 04:16:40 AM
by Tas_mania