Yes, you can increase the resolution of the texture mapping to make the overlying layers appear sharper:
- In 3D View, click Surfaces in the Contents window.
- In the Properties window, select the General tab.
- Expand the Texture Resolution header, if necessary.
- Increase the Texture width setting to be the desired number of overlay pixels in the X direction
- Increase the Texture height setting to be the desired number of overlay pixels in the Y direction
Updated October 24, 2018