The Texture feature in the UI will help you use text prompts or image uploads to revamp textures for your models.
To use it, first select a fully generated model from your Workspace. Then, head to Texture on the left side of the screen, which will then take you to the following:
In "Text Input", you can type in a prompt (without utilizing negative prompt as Meshy does not support those) to get the texture that you want. Or, you can select Image Input, and upload an image:
You can still generate PBR maps for the texture as well. Textures can be generated with Meshy 5 and Meshy 6.
Then, click the "Texture" button, and Meshy will generate a new model with the texture prompts you inputted!