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Multi-Pass Rendering Effects 1227
Multi-Pass R endering
Effects
Create panel > Cameras > Target or Free > Parameters
rollout > Multi-Pass Effect group
Motion blur applied to wings of the flying dragon
Cameras can create two kinds of rendering effects:
•
Depth of field (page 2–1228)
• Motion blur (page 2–1230)
Multi-pass rendering effects use multiple
renderingsofthesameframe,withslightcamera
movement between each rendering. The multiple
passes simulate the blurring that film in a camera
would register under certain conditions.
Although it is not a multi-pass effect, the choices
in the drop-dow n list also let you specify the
depth-of-field value for the
mental ray renderer
(page 3–77)
.See Depth of Field Parameter (mental
ray Renderer) (page 2–1227)
.
Depth of Field Parameter (mental
ray Renderer)
Create panel > Cameras > Target button or Free button >
Parameters rollout > Multi-Pass Effec t group. > Turn on
Enable and choose Depth Of Field (mental ray). > Depth
of Field Parameters rollout
On the Parameters rollout (page 2–1218) ,a
“Depth Of Field (mental ray)” choice has been
added to the Multi-Pass Effect drop-down list to
support the mental ray renderer’s depth-of-field
effects. To use this, turn on both Enable in the
camera’s Multi-Pass Effect group, and Depth Of
Field on the Camera Effects rollout of the
Render
Scene dialog (page 3–2)
.
The mental ray depth-of-field is exclusive of the
multi-pass version of the depth-of-field effect. The
mentalrayrendereralsosupportsmotionblurfor
cameras,butthecontrolsarenotonthecamera’s
Parameters rollout: use the Motion Blur toggle on
the Object Properties dialog for camer a objects.
This setting has no effect on the default 3ds Max
scanline renderer.
Note: When you use the mental ray renderer,
reflected or refrac ted light rays do not always
respect a camera’s clipping planes (set i n the
Clipping Planes group of the P arameters rollout).
Also, large clipping-plane values can cause poor
qualityintherenderingofshadowmaps.Tofix
this, narrow the clipping range or use ray-traced
shadows.
Interfa ce
f-Stop—Sets the camera’s f-Stop. Increasing
the f-Stop value narrows the depth of field, a nd
decreasing the f-Stop value broadens the depth of
field. Default=2.0.