"Chris Huff" <chr### [at] yahoocom> wrote in message
news:chrishuff_99-5FCBBC.16050516042000@news.povray.org...
| I personally prefer to use trace(), since it works on any object. If you
| decide later to have a flat area on the landscape using CSG or to use an
| isosurface as the landscape, trace() will still work, but hf_height_at
| won't...
| Also, you can get the surface normal with trace(), which can be useful
| for some things.

Hey thanks, hadn't thought of it failing when used in CSG.  I was planning on
flat areas for water but will probably just blacken out parts in the image used
for the HF.  Not likely to add objects in, like buildings and such, but I should
start trying out trace anyway.

Bob

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