Far position of rendered objects from zero world coordinates causes incorrect render result. #41073

New Issue

Borek Bures · 2014-07-14T22:51:46+02:00

Borek Bures commented

2014-07-14 22:51:46 +02:00

System Information
Win7 64bit

Blender Version
Broken: 2.69_r60995; 2.70a_f93bc76; 2.71_9337574; 2.71.1_d9f3925
Worked: probably never

Short description of error
Far position of rendered objects from zero world coordinates causes black artefacts/holes on mash, regardless camera is close.

Location 0 - no errors:

Location 1000 - slightly visible errors:

Location 10000:

Location 100000:

Exact steps for others to reproduce the error
Select "Cube" and increase Y location to 10000.
Blend file: BrokenMash.blend

**System Information** Win7 64bit **Blender Version** Broken: 2.69_r60995; 2.70a_f93bc76; 2.71_9337574; 2.71.1_d9f3925 Worked: probably never **Short description of error** Far position of rendered objects from zero world coordinates causes black artefacts/holes on mash, regardless camera is close. Location 0 - no errors: ![Location0.jpg](https://archive.blender.org/developer/F97825/Location0.jpg) Location 1000 - slightly visible errors: ![Location1000.jpg](https://archive.blender.org/developer/F97827/Location1000.jpg) Location 10000: ![Location10000.jpg](https://archive.blender.org/developer/F97829/Location10000.jpg) Location 100000: ![Location100000.jpg](https://archive.blender.org/developer/F97831/Location100000.jpg) **Exact steps for others to reproduce the error** Select "Cube" and increase Y location to 10000. Blend file: [BrokenMash.blend](https://archive.blender.org/developer/F97833/BrokenMash.blend)

Borek Bures commented

2014-07-14 22:51:46 +02:00

Changed status to: 'Open'

Borek Bures commented

2014-07-14 22:51:46 +02:00

Added subscriber: @BorekBures

Bastien Montagne commented

2014-07-14 23:23:07 +02:00

Added subscriber: @mont29

Kyle Halladay self-assigned this 2014-07-20 22:21:53 +02:00

Kyle Halladay commented

2014-07-21 00:30:08 +02:00

This comment was removed by @khalladay

*This comment was removed by @khalladay*

Kyle Halladay removed their assignment 2014-07-23 02:08:08 +02:00

Kyle Halladay commented

2014-07-23 02:08:08 +02:00

Added subscriber: @khalladay

Kyle Halladay commented

2014-07-23 02:08:08 +02:00

After digging into the code, it looks like this task is beyond me right now (how embarrassing), I've un claimed it, hopefully someone with much more experience with renderers of this complexity can pick it up soon!

Campbell Barton commented

2014-08-05 20:52:25 +02:00

Changed status from 'Open' to: 'Archived'

Campbell Barton closed this issue

2014-08-05 20:52:25 +02:00

Campbell Barton self-assigned this 2014-08-05 20:52:25 +02:00

Campbell Barton commented

2014-08-05 20:52:25 +02:00

This is just float precision - upwards of 5000+, precision degrades.

closing as known limitation.

This is just float precision - upwards of 5000+, precision degrades. closing as known limitation.

Borek Bures commented

2014-08-05 21:29:36 +02:00

Changed status from 'Archived' to: 'Open'

Borek Bures reopened this issue

2014-08-05 21:29:36 +02:00

Borek Bures commented

2014-08-05 21:29:36 +02:00

I thing that is it a bug, because this one of errors (black lines - no holes) occurs in my other scene on objects with location 500 blender units from zero.
I know about float precision limits, but why is limitation absolute from zero, why isn't relative from active camera view?
Please, reopen this bug.

I thing that is it a bug, because this one of errors (black lines - no holes) occurs in my other scene on objects with location 500 blender units from zero. I know about float precision limits, but why is limitation absolute from zero, why isn't relative from active camera view? Please, reopen this bug.

Thomas Dinges commented

2014-08-06 01:32:16 +02:00

Added subscriber: @ThomasDinges

Thomas Dinges commented

2014-08-06 01:32:16 +02:00

This might be fixable with a more clever BVH traversal algorithm, but that is a bigger todo, and not something we consider a bug now.

Thomas Dinges commented

2014-08-06 01:45:10 +02:00

Changed status from 'Open' to: 'Archived'

Thomas Dinges closed this issue

2014-08-06 01:45:10 +02:00

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Far position of rendered objects from zero world coordinates causes incorrect render result. #41073