9

Camera Effects Rollout (mental ray Renderer) 101
Came ra Effec ts Rollout (m en tal ray
Renderer)
Rendering menu > Render > Render Scene dial og >
Renderer panel > Camera Effects rollout
Main toolbar > Render Scene > Render Scene dialog >
Renderer panel > Camera Effects rollout
Note: The Renderer panel appears o nly when the mental
ray renderer is the cur rently active renderer.
The controls in this rollout are for the camera
effects depth of field (page 3–90) and motion blur
(page 3–89),aswellasforcontour shading (page
3–96) and adding camera shaders.
Pr ocedur es
To us e dept h of fi eld for a Camer a vi ew:
1.
On the camera’s Parameters rollout, in the
M ulti-Pass Effect group, turn on Enable and
choose Depth Of Field (mental ray).
2. Set the camera’s target distance to the range at
which you want objects to be clearly in focus.
For a Target camera, you can select t he
camera ’s target object and move it. For a Free
camera, you adjust the Target Distance on t he
Parameters rollout.
3. On the C amera’s Depth Of Field rollout,
decrease the f-Stop value to narrow the depth
of field, or increase the f-Stop value to broaden
the depth of field.
You might need to experiment with f-Stop
values to get the effect you want.
4. Render the scene.
To us e depth of fiel d for a Per specti ve v iew:
1.
On the Render Scene dialog, go to t he Renderer
panel > Camera Effects rollout, and in the
Depth Of Field (Perspective Views Only) g roup,
turn on Enable.
2. Set the Focus Plane distance to the range at
which you want objects to be clearly in focus.
3. Decrease the f-Stop value to narrow the depth
of field, or increase the f-Stop value to broaden
the depth of field.
You might need to experiment with f-Stop
values to get the effect you want. If you have
trouble getting good results with f-Stop, use
thedrop-downlisttochangethemethodto
In Focus Limits, then adjust the Near and Far
values to enclose the region of the scene you
want to be clearly in foc us.
4. Render the scene.
To use motion blur:
1.
Select each object you want to be blurred by
motion, right-click and choose Propert ies,
then on the Object Properties dia log > Genera l
panel, make sure that in the Motion Blur group,
Enable is turned on and Object is chosen.
The mental ray renderer won’t generate motion
blur if Image is the chosen type.
2. On the Render Scene dialog, go to the Renderer
panel > Camera Effects rollout, and in the
Motion Blur group turn on Enable.
Note: With the mental r ay renderer, don’t use
Motion Blur under the Multi-Pass Effect group
of a camera’s Parameters rollout.
3. Increase the Shutter value to increase the
blurriness caused by motion blur.
4. On the Render Scene dialog, go to the
RenderingAlgorithmsrollout,andmakesure
Ray Trace is turned on.
Motion blur is not rendered when the mental
ray renderer uses scanlines only.
5. Render the scene.