8

General Lighting Parameters 1177
Scene with shadow-mapped shadows
Shadows rendered using default parameter settings
Note: When you render a scene, you can turn
rendering of shadows on or off.
To cast area shadows:
• On the General Parameters rollout, choose
Area Shadows from the drop-down list.
Use controls on the
Area Shadows rollout (page
2–1202)
to adjust the shadow properties.
To cast advanced ray-traced shadows:
Advanced ray-traced shadows are similar to
ray-traced shadows, however they provide control
over
antialiasing (page 3–1001) ,lettingyou
fine-tune how shadows are generated.
• On the General Parameters rollout, choose
Advanced Ray-traced Shadows from the
drop-down list.
Use controls on the
Advanced Ray-traced
Params rollout (page 2–1200)
to adjust the
shadow properties.
To cast shadow-mapped shadows:
1.
On the General Parameters rollout, choose
Shadow Maps from the drop-down list.
2. Go to the Shadow Map Params rollout (page
2–1208)
.
• Use the Size spinner to set the size of the
shadow map.
• Use the Bias spinner to adjust the shadow
offset, if necessary.
• UsetheSampleRangespinnertocreatea
soft-edged shadow.
To cast ray-traced shadows:
Ray-traced shadows (page 3–1094) are generated
by tracing the path of rays sampled from a light
source. Ray-traced shadows are more accurate
than shadow-mapped shadows.
1. On the General Parameters rollout, choose
Ray-Traced Shadows from the drop-down list.
2. Use controls on the Ray Traced Shadow Params
rollout (page 2–1207)
to adjust the shadow
offset, if n ecessary.
To keep an object fr om cas ting sha dows:
1.
Select the object.
2. Rig ht-click the object to display the quad menu
and choose Propert ies from the Transform
quadrant.
The
Object Properties dialog (page 1–111) is
displayed.
3. Tu r n off Ca s t Shadows, an d t hen cl ic k OK.
Now when you render the scene, the object
casts no shadows.
To ma k e a n object not receive sha dows:
1.
Select the object.
2. Rig ht-click the object to display the quad menu
and choose Properties from the lower-right
(Transform) quadrant.
The
Object Properties dialog (page 1–111) is
displayed.
3. Tu r n off Rece ive Shadows, a nd the n click OK.
Now when you render the scene, the object
receives no shadows.