Hi to all fern-fans *g* and of course to all others too,
First, thank you very much for your explanation of WIP. I got the meaning
while reading several postings but couldn't figure out the exact shortcut.
A lot of things happened to the fern scene mostly based on your feedback and
comments.
I split the code into two include files (one for the leaves one for the
wing). Some additional "Level of detail" variables simplified quick test
renderings and camera arrangements. After that I did re-measuered on my well
known "living-room-fern" to place the leaves more realistic onto the main
stem. Additionally I got interesting results about it's proportions and how
they change while aging.
Finally I developed some algorithms to compute the colour depending on the
leave's age, modified the normal slope map and changed some stuff in the
textures until a small leaf was realistic enough for my needs in a close-up.
Additional optimisations reduced the number of objects from over 14000 (for
two wings) down to 3900 without noticeable reduction of details.
Well then.... talking a lot but finally here's the picture.
A detail shot will follow as usual.
Any comments/hint/remarcs/tips are very welcome!
Have a nice day,
regards
and this is a close-up again.
compared to the last detail it is IMHO more realistic. The main stem is now
greenish on the tip and brownish on the root. The small stem of the leaves
is now more realistic (it was a blob but the periodic bumps were aretfacts).
Unfortunately show the shadows artefacts due to the triangle nature of the
mesh. The normals do their best but if the angle of incoming light is too
small the whole triangle "drops out."
In this situation one should place the light sources carefully or should use
area lights.
regards
SY
> > The small stem of the leaves is now more realistic (it was a blob but the> periodic >bumps were aretfacts).
If the bumps were caused by joining two blob cylinders, try adding a sphere of
the same radius with strength value -1 at each of the joins. It will cancel out
the effect of what is essentially strength 2 at the point where the two
cylinders meet.
From: Rick [Kitty5]
Subject: Re: Fern update WIP :-)
Date: 20 Jan 2002 06:14:32
Message: <3c4aa698$1@news.povray.org>
looking much better - how about a rendering a few whole fern plants?
--
Rick
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> If the bumps were caused by joining two blob cylinders, try adding a
sphere of
> the same radius with strength value -1 at each of the joins. It will
cancel out
> the effect of what is essentially strength 2 at the point where the two> cylinders meet.
I was thinking about that but then I decided to get rid of the blob. It was
a work-around anyway since I just wanted to avoid the small gaps at the
junctions of the cylinders. Now it is a union of cones (since the stem get's
thinner to the tip) and small spheres in the junctions which give the
impression of a continous pipe. I'm more satisfied with this since I have
easier control over the stem thickness.
Anyway, thanks for your hint!
regards
SY
> This is getting REAL GOOD! :))> Congratulations. Looks like the real thing.
Thank you very much. I think it's almost finished now.
Now the macros have to proofe themselves when I start to create a complete
fern.
regards
SY
> looking much better - how about a rendering a few whole fern plants?
Currently tracing :-)
But I still adjust some optimisations to speed up parsing and reduce the no.
of objects. Up to now I experimented with few wings but it always looks like
a dead fern *g*
regards
SY
