Texture Compositor node composition artifact (random pixels) #45529

New Issue

Dolphin Dream · 2015-07-22T22:38:54+02:00

Dolphin Dream commented

2015-07-22 22:38:54 +02:00

System Information
OS: Ubuntu 14.04 (64 bit)
RAM : 7.8 GiB
CPU: Intel® Core™ i5-2400 CPU @ 3.10GHz × 4
GFX: GeForce GT 520/PCIe/SSE2

(the artifact occurs on a Mac OS 10.x 64 bit system)

Blender Version
2.75a (hash: c27589e)

Short description of error
When compositing (two) cloud texture nodes in compositor I get a random pixel artifact over the composition. (see attached image and blend file).
The random pixels are changing with every render (of the same frame) or even with viewport re-display (e.g. if shift+ctrl + lmb on any node to connect it to a view node the re-composition is triggered and the pixels are displayed in a different location). Apparently even when clicking on the timeline (same frame), which will trigger a re-composition, the random point artifact changes to a different pattern. I confirm this is not just a viewport issue, it actually renders with the artifact points as well in the final image.

The included blend file has a somewhat more complex node graph than needed to replicate the bug (I was able to replicate this artifact with an even simpler node graph, but i don't have that blend file anymore).

Exact steps for others to reproduce the error
see attached blend and screenshot.

textureCompositionTest.blend

**System Information** OS: Ubuntu 14.04 (64 bit) RAM : 7.8 GiB CPU: Intel® Core™ i5-2400 CPU @ 3.10GHz × 4 GFX: GeForce GT 520/PCIe/SSE2 (the artifact occurs on a Mac OS 10.x 64 bit system) **Blender Version** 2.75a (hash: c27589e) **Short description of error** When compositing (two) cloud texture nodes in compositor I get a random pixel artifact over the composition. (see attached image and blend file). The random pixels are changing with every render (of the same frame) or even with viewport re-display (e.g. if shift+ctrl + lmb on any node to connect it to a view node the re-composition is triggered and the pixels are displayed in a different location). Apparently even when clicking on the timeline (same frame), which will trigger a re-composition, the random point artifact changes to a different pattern. I confirm this is not just a viewport issue, it actually renders with the artifact points as well in the final image. The included blend file has a somewhat more complex node graph than needed to replicate the bug (I was able to replicate this artifact with an even simpler node graph, but i don't have that blend file anymore). **Exact steps for others to reproduce the error** see attached blend and screenshot. [textureCompositionTest.blend](https://archive.blender.org/developer/F211729/textureCompositionTest.blend) ![Screenshot from 2015-07-22 15:44:14.png](https://archive.blender.org/developer/F211730/Screenshot_from_2015-07-22_15_44_14.png)

Dolphin Dream commented

2015-07-22 22:38:54 +02:00

Changed status to: 'Open'