2. Select filter function: select filter-gradient mapping in the menu bar to pop up the gradient mapping panel.
3. Add vanishing point: In the Gradient Mapping panel, select the radial gradient type, then click the Edit button to add vanishing point in the center of the photo, and drag the vanishing point to adjust its position and size.
4. Adjust gradient options: In the gradient mapping panel, you can adjust gradient options, such as color, transparency and other parameters.
5. Finish vanishing point mapping: After completing the above steps, click OK to generate vanishing point mapping effect. If the edge of the cup is irregular, you may need to use other tools (such as eraser and mending tools) to further process the image to make the vanishing point effect more natural.