Graphics Programs Reference
In-Depth Information
Figure 10.32
You easily can set
whether an object
casts or receives
shadows.
Raytracing Soft Shadows
One interesting feature of shadows is that they can diffuse or soften as the shadow falls
from its casting object. This small detail can greatly enhance the reality of any render.
In Figure 10.33, you can see the still life rendered with sharp raytraced shadows.
However, softening shadows even in a small scene like this can help the look of the
render. In Figure 10.34, you see the same render but this time with softening shadows.
Notice how the shadow softens more toward the edge of the shadow; the shadow is still
sharp at the point of contact.
This gives a much nicer feeling of depth to the scene. There is an increase in render
time—it's important to evaluate how much softening you need so you don't overdo the
look or increase the render time too much.
Figure 10.33
Regular raytraced shadows
Figure 10.34
Softening the shadows creates a nice effect.
