[Chimera-users] Visualizing negative volume as in CastP

Hello everyone, I am trying to visualize cavities from a protein I am currently working on. Therefore I calculated the cavities volume using CastP. I then import the obtained files into chimera. Unfortunately CastP visualizes the cavities as a negative volume of the solvent accessible area. Chimera on the other hand only shows the surface. So is there a way to also visualize the negative volume in Chimara just like in CastP ? Thanks in advance! All the best, Chris