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This is my version of LightWave-water. My goal was to achieve
a believable effect without
thousands of displaced polygons but with only 1 single quad
poligon. I had to deal with the same
old "bug" of version 5.6: just with a few percent of bumpmapping
the reflections show rendering
errors. Other users already documentated this error but
I wanted to find a workaround for this
special case with the water. I tried out several things
until I realized that this rendering errors in
the surface show reflected parts of the "negative world".
Instead of reflecting the sky, the
water reflects at some places the sky beneath the water!
So my job was to make a Sky that is mirrored at the horizon.
Unfortunately this means that you can't use an Environment Backdrop like
Skytracer. In my case I wanted to use a skytracer background and therefore
followed the instructions of the "Lightwave Reflection Map Generator: Refgen".
All I did after that was to put
a mirrored copy of that reflectionmap beneath the horizon
in Photoshop. I used this image as an
Environment Texturemap with spherical projection and the
reflection options of the watersurface
are set to raytracing and backdrop. So the water can still
reflect other objects.
The water uses the following parameters:
color 138, 171, 158 / diffuse 40% / specularity 80% / glosiness
50% / reflection 60% / bump 200%
For the water bumpmap I used three layers of different sized
turbulence. On top with 20% layer
opacity and scale of 30cm in all directions. The second
layer has 30% opacity and a scale of 1m
and the third layer has 10% opacity and a scale of 100m.
There are no plugins loaded. The water is rendered from 1m height.
By Ralf Maeder
Contact: ralf_maeder@yahoo.com
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