Nathan Gray

Got it. Much thanks, John! I appreciate the prompt replies.

@jcbowman That helped a lot. Thank you! However, another issue has just arisen: The intersection of the surface with a vertical plane is not as nice as it was previously---the "back part" of the surface is not rendering correctly. Compare the two images that are attached. In both versions, there are three materials being used (all defined similarly): The first material is for the back part of the surface (on one side of the plane, away from the origin). A second material for the front part of the...

@jcbowman That helped a lot. However, another issue has just arisen: The intersection of the surface with a vertical plane is not as nice as it was previously---the "back part" of the surface is not rendering correctly. Compare the two images that are attached. In both versions, there are three materials being used (all defined similarly): The first material is for the back part of the surface (on one side of the plane, away from the origin). A second material for the front part of the surface (other...

@jcbowman That helped a lot. However, another issue has just arisen: The intersection of the surface with a vertical plane is not as nice as it was previously---the "back part" of the surface is not rendering correctly. Compare the two images that are attached. In both versions, there are three materials being used (all defined similarly): The first material is for the back part of the surface (on one side of the plane, away from the origin). A second material for the front part of the surface (other...

@jcbowman That helped a lot. However, another issue has just arisen: The intersection of the surface with a vertical plane is not as nice as it was previously---the "back part" of the surface is not rendering correctly. Compare the two images that are attached. In both versions, there are three materials being used (all defined similarly): The first material is for the back part of the surface (on one side of the plane, away from the origin). A second material for the front part of the surface (other...

@jcbowman That helped a lot. However, another issue has just arisen: The intersection of the surface with a vertical plane is not as nice as it was previously. Compare the two images that are attached.

That is, is there a general recipe for getting the same material as before, except now without ambientpen?

I recently updated my versions of TeXShop and Asymptote on my MacBook Air. I keep receiving errors when I try to recompile old Asymptote pictures. The issue appears to be that ambientpen is no longer in use. I'm trying to recreate my same exact Asymptote pictures, except now I have to do so without using ambientpen (which was used previously). The two pictures below---old and new---show the two surfaces I'm trying to match up. I want the new picture (darker surface) to look exactly like the old picture...