This image shows basic full-scene antialiasing. It was rendered using
9 samples per pixel. Compare with the similar scenes done without
anti-aliasing which are at the bottom of this page.
This image exhibits some faint bainding on the ground plane. This
happened because at the time I had some code that adding things
together AFTER switching to integer values, instead of keeping things
in floating point until the very end. So it ended up doing some
bucketing. I fixed this, but I thought it was interesting to see what
can go wrong with one very slight variation to the code.
An extended light source plus a directional light source. Although
behaving precisely as programmed, the directional light appears to
cast way too abrupt a shadow, ruining the realism of the soft shadow
from the extended light.
Check out the scene file: basicext1.xml
Again the extended light source scene. This time shadowing with the
directional light is disabled. Ahh. Much nicer.
Check out the scene file: basicExt_noDirShadow.xml
Texture on triangles. The ground is made of two textured triangles.
And of course the triangle standing up is textured too.
Check out the scene file: basic_tritex2.xml
A scene with a glossy reflection. The gloss coeffecient is 0.95. A
coeffecient of 1.0 is perfect mirror reflection, while 0.0 is completely
blurry. The aliasing towards the horizon shows the painful lack of
any sort of mip-mapping
Check out the scene file: basic_gloss1.xml
A slightly better example of glossy reflection, this object has a
glossy coefficient of 0.87. The noisyness of the reflection tells us
A) that we aren't using a very good sampling function, and B) we could
have used more samples (this was 16 samples/pixel).
Check out the scene file: basic_gloss_87.xml
This one shows the effect of varying the glossyness. The sphere on
the left has a glossyness of 0.84 and that increases toward 1.0 with
the sphere on the far right. Here we used 25samples/pixel.
Check out the scene file: basic_gloss_varying.xml
What happens if you add too many lights!
Check out the scene file: test1.xml
A test of the "noshadow" option. It worked! Nothing is casting a shadow.
Check out the scene file: test2.xml
Here are some images that my ray tracer generated (they are in PNG format so you will need a modern browser that can handle them):
If you (or your browser) don't like PNG then you can find other versions