9

Diagnostics Rollout (mental ray Renderer) 123
Render Elements group
This toggle is for when you are rendering s eparate
elements (page 3–130).
Rend er Final Ima ge—When on, renders a final,
“beauty”passinadditiontotheseparateelements.
When off, renders only the elements. Default=off.
Mapping group
Sk ip Maps and Tex tures—When on, rendering
ignores maps and textures, including projection
maps, and uses only surface colors ( diffuse,
specular, and so on). Default=off.
Turningoffmapscanbeuseful,andsavetime,
when you are adjusting global illumination.
Dia gnostics R ollout (mental r ay
Renderer)
Rendering menu > Render > Render Scene dial og >
Processing panel > Diagnostics rollout
Main toolbar > Render Scene > Render Scene dialog >
Processing panel > Diagnostics rollout
Note: The Processing panel appears only when the
mental ray renderer is the currently active renderer.
ThetoolsontheDiagnosticsrolloutcanhelp
you understand why the mental ray renderer is
behavi ng in a certain way. The Sampling Rate
tool, in particular, can help explain the renderer’s
perfor mance.
Each of these tools generates a rendering that
is not a photorealistic view, but a schematic
representation of the functionality you have
chosen to analyze.
Interfa ce
Enable—When on, the renderer renders the
graphic representation for the tool you have
chosen.
Sampling R ate—When chosen, renders an image
thatshowswheresampleswerecollectedduring
rendering; see Sampling (mental ray Renderer)
(page 3–1005).Thiscanhelpyouadjustthe
contr ast and other sampling parameters.
Coordi nate S pace—Renders an image that shows
thecoordinatespaceofobjects,theworld,or
camera.
•
Object—Shows local coordinates (UVW). Each
object has its own coordina te space.
•
World—Shows world coordina tes (XYZ). The
same coordinate system applies to a ll objects.
•
Came ra—Shows camera coordinates, which
appear as a rectangular grid superimposed on
the view.
Size—Sets the size of the g rid. Default=1.0.
Tip: To avoid busy moiré patterns in the grid,
increase the val ue of Size.
Photon—Renders the effect of a photon m ap in the
screen. This requires that a photon map b e present
(to render caustics or global illumination). If no
photon map is present, the Photon rendering looks
just like the nondiagnostic rendering of the scene:
the mental ray renderer first renders the shaded
scene, then replaces it with the pseudo color image.