Operating system: Windows 10 64-bit
Graphics card: Nvidia gtx 1060 6GB
Broken: 2.80, b46245470f79, master, 2019-4-21
**Short description of error**
If you have a Principled BSDF node that has textures connected to its Base Color and Transmission inputs, then connect this shader's output to a Mix Shader node having an Image Texture connected to its Factor input, the resulting shader output from the Mix Shader node will have a black diffuse where it should show the Principled BSDF's Base Color.
**Exact steps for others to reproduce the error**
- Open the attached .blend file.
- Notice there are black stripes in the cube.
- They shouldn't be black, but the same color as the transmissive parts.