If your material and texture swatches do not render in the Hypershade, you may need to increase the maximum resolution setting for swatches.
Select Windows > Settings/Preferences > Preferences to open the Preferences window. In the Display section, select a higher resolution from the Max res. for swatches drop-down list.
You can also render an individual swatch by right-clicking the swatch and selecting Refresh Swatch from the marking menu.