@Dee. I am not sure how you created the .pat file but that is a Photoshop file format and cannot be used in PSP. If you create a gold pattern, it has to be saved in .jpg format. In addition, having the tile open in your workspace will make it show in the Material Properties dialog window but not in the Sculpture materials. So you will have to save your gold in a jpg format in your Patterns folder and then it will be available in the Sculpture effect.