Autodesk LIGHTSCAPE, Manual

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Lightscape
Ray Trace Direct Illumination
This option ray traces direct light contributions
from lighting sources (the sun and all selected lumi-
naires). Use this option to correct shadow aliasing
problems and provide additional enhanced lighting
effects, such as highlights on nondiffuse surfaces.
For more information, see Appendix D, “Reflection
Models.”
Remember that the time required to generate images
can increase significantly with the number of light
sources that are ray traced.
Soft Shadows From Sun
By default, Lightscape renders shadow boundaries
caused by the sun as sharp edges. Enable this option
to blur the edges to provide a more realistic and
natural shadow boundary.
Note: This option can significantly increase the
rendering time of an image.
OpenGL Compatible
Because OpenGL and the Lightscape ray tracer use
different reflection models, images created from the
same Solution model do not look the same rendered
with OpenGL as when rendered with the ray tracer.
The OpenGL Compatible option forces the ray
tracer to generate images that closely match the
OpenGL display rendering. It also adds specular
reflections, but does not render them to as high a
quality as is possible when this option is not enabled.
For more information, see Appendix D, “Reflection
Models.”
Antialiasing Samples
Use antialiasing to smooth out jagged edges. This
improves image quality and provides better results
when the model contains features smaller than a
single pixel.
Ray Bounces
To control how many levels of reflection or transmis-
sion are calculated during ray tracing, specify the
number of ray bounces tracked in this box.
To export a rendered panoramic image:
1.
Choose File | Export | Panoramic.
2.
Click Rendering.
3.
The Panoramic Rendering Options dialog ap-
pears.
4.
To ray trace the direct lighting contribution from
the sun and selected luminaires, enable Ray Trace
Direct Illumination.
Note:
Lightscape ray traces only the luminaires
that have their Ray Trace Direct Illumination prop-
erty enabled.
5. To blur the edges of shadow boundaries caused
by the sun, enable Soft Shadows From Sun.
6.
To generate images that closely match the
OpenGL display, enable OpenGL Compatible.
7.
To increase the number of antialiasing samples,
select the appropriate level from the Antialiasing
Samples list.
Note: Increasing the antialiasing level will increase
your processing time.
8.
Enter the number of ray bounces in the Ray
Bounces box.
9.
Click OK.