checker texture strange behavior in cycles #48139

Windows 7 64

Broken in 2.77a and in latest daily (c1a27a7)
Worked in 2.76b

Checker texture behaves strangely in cycles render, in both viewport and final. Issue appears\visible only if texture coordinates are rotated (mapping node). Bug seems to be in checker texture as other textures (noise, brick) render normally

Steps to reproduce: Assign checker texture to any object (box, suzanne) and rotate its texture coordinates with mapping node

cube_checker.blend

Changed status to: 'Open'

Added subscriber: @NikoMaisuradze

Added subscriber: @Sergey

I can't really reproduce the issue neither on Linux nor on Windows 7.

Does it happen for you on both CPU and GPU? It is enough to open attached file and go to rendered viewport in order to see the bug?

Yes. Opening attached file and rendering in viewport or f12 is enough to see the bug. (you may have to create camera for f12 though)
Bug mostly is visible on rotated texture coords

Bug only appears on GPU. (forgot to mention)

What's your GPU? And can you share system-info created by Help -> Save System Info ?

2 GPUs. 980 and 980 Ti. Bug appears on rendering with each of GPUs separately, and with both together

system-info.txt

Managed to reproduce with 980Ti on Win10. Will have a look later,

This issue was referenced by 3165e8740b

Changed status from 'Open' to: 'Resolved'

This issue was referenced by blender/cycles@bab3475d68

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

checker texture strange behavior in cycles #48139