Think of the setting as three layers: Module Inner Border Radius (px) rounds the outside edge, Rim (px) sets the thickness of the glass frame, and Face Corner Radius (px) rounds the solid inner card. By default, the face radius is the outer radius minus the rim, with a minimum of 0.
- Open Style → Positioning → Module background and set Module Inner Rim Options to Effect.
- Turn on Override Module Inner Border, set Module Inner Border Radius (px), and then set Rim (px) in the Glass, Grain, or Pattern settings for the rim.
- In those same rim settings, turn on Override Face Corner Radius and enter Face Corner Radius (px).
For example, an outer radius of 28px with a 25px rim produces a 3px face radius automatically. To round the white inner card to 16px instead, turn on the face override and enter 16.
