Transparent triangular Render artifacts #51914

New Issue

Janek · 2017-06-27T20:34:14+02:00

Janek commented

2017-06-27 20:34:14 +02:00

Blender Version
Broken: 2.78

Short description of error
When I render an animation, in some frames(like frame 24, which is depicted below) there is a piece cut out. This bug eventually vanished after increasing the distance between camera and plane by about 20, but it's still weird and annoying.

Exact steps for others to reproduce the error
Download the .blend and Render. You can scroll through other frames and will find this artifact appearing again when rendering
blender file: https://blend-exchange.giantcowfilms.com/d/3451/artifacts.blend

View this Stack Exchange question for additional information:
https://blender.stackexchange.com/questions/82213/weird-render-transparency-artifact

**Blender Version** Broken: 2.78 **Short description of error** When I render an animation, in some frames(like frame 24, which is depicted below) there is a piece cut out. This bug eventually vanished after increasing the distance between camera and plane by about 20, but it's still weird and annoying. ![hHQHz.jpg](https://archive.blender.org/developer/F644513/hHQHz.jpg) **Exact steps for others to reproduce the error** Download the .blend and Render. You can scroll through other frames and will find this artifact appearing again when rendering blender file: https://blend-exchange.giantcowfilms.com/d/3451/artifacts.blend View this Stack Exchange question for additional information: https://blender.stackexchange.com/questions/82213/weird-render-transparency-artifact

Janek commented

2017-06-27 20:34:14 +02:00

Changed status to: 'Open'

Janek commented

2017-06-27 20:34:14 +02:00

Added subscriber: @Xerus

Bastien Montagne commented

2017-06-28 10:29:47 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2017-06-28 10:29:47 +02:00

Uuuh… weird, looks like a triangulation issue. Not sure what happens here, in viewport rendering shows no issue, and your scene does not use insane scaling or nearly-coplanar faces, so…

As a workaround for now, looks like triangulating the problematic plane (Image one, e.g. with a modifier) fixes the bug.

Uuuh… weird, looks like a triangulation issue. Not sure what happens here, in viewport rendering shows no issue, and your scene does not use insane scaling or nearly-coplanar faces, so… As a workaround for now, looks like triangulating the problematic plane (Image one, e.g. with a modifier) fixes the bug.

Brecht Van Lommel commented

2017-07-02 20:00:12 +02:00

Added subscriber: @brecht

Brecht Van Lommel commented

2017-07-02 20:00:12 +02:00

This is an old issue, see e.g. #18056 (Quad directly infront of the camera gives artifacts).

Bastien Montagne commented

2017-07-03 12:02:45 +02:00

Wow… indeed…
Will close the report as known issue then, tbh it’s very unlikely it ever gets fixed now, since we plan to remove Blender Internal from Blender2.8 (to be replaced by real-time OpenGL Eevee). Thanks anyway!

Wow… indeed… Will close the report as known issue then, tbh it’s very unlikely it ever gets fixed now, since we plan to remove Blender Internal from Blender2.8 (to be replaced by real-time OpenGL Eevee). Thanks anyway!

Bastien Montagne commented

2017-07-03 12:03:09 +02:00

Closed as duplicate of #18056

Bastien Montagne closed this issue

2017-07-03 12:03:09 +02:00

Janek commented

2017-07-09 17:11:16 +02:00

but I like BI because it is fast and not focused on realism, which is exactly what I need for my visualiser.
Will Eevee be able to deliver the same speed?

but I like BI because it is fast and not focused on realism, which is exactly what I need for my visualiser. Will Eevee be able to deliver the same speed?

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Transparent triangular Render artifacts #51914