V-Ray Mix node ignores Mix Amount but works with Mix Map color

[JuhaW]

Upper image, node setup when Mix node is working. Without connecting color to Mix map socket its not working.

V-Ray Mix node.jpg

[iavor_vajarov]

Thank you for the bug report. The issue seems to be present only when rendering on the GPU. I logged a ticket. In the meanwhile, you should be able to work around this by switching to CPU rendering.