I was digging around my old files and found a scene with a very low 
resolution heightfield that has a nice shape, but is jagged where it 
intersects my "water" plane regardless of the smooth setting. Somehow, 
back in 2007 I was able to increase the "resolution" of the heightfield 
by giving it a black to white texture and capturing an image of it using 
an orthographic camera hanging directly above it.

The scene still "works" in the sense that the output is another 
heightfield. However it is not smooth! I.e. the low-resolution geometry 
of the original heightfield is noticeable, even with the smooth setting 
turned on. Maybe I made some changes in the interim... Maybe I was using 
an older version of POV...

Any ideas?

-Mike

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