Here’s how to transfer textures from ZBrush to Maya:
Step 1: Under Texture Map, click on New From Polypaint

Step 2: A texture map should appear on your Brush Texture.

Step 3: Then click on Export, to send it where you want it.

When importing the texture into Maya, keep in mind that your texture could be upside down (ZBrush has its quirks). You can simply flip it in your image editing software. There’s also an option to adjust the export orientation within ZBrush.
See also:
- Error: “Missing Map Files” In 3ds Max
Source: Quora
Solution by: Kevin 仙 Stark, Game Designer and 3D Artist