You're viewing a blank texture. Here are some pointers to get you started:
Quick Generate Tool: Type in a prompt, select a texture material type and watch as Poly creates a fully-formed 32-bit EXR texture for you.
Make Patches Tool: You can use this to play around with Poly's AI, seeing what it is capable of and experimenting with prompting strategies.
Bottom Tray: The dock at the bottom of the screen lets you switch views. You can view your past prompts , view a model in 3D , or view any of the six available physical-based rendering maps.
Documentation: For more help, you can always click on the documentation button to open a contextual sidebar with helpful directions and suggestions.