8

582 Chapter 20: Managing Scenes and Projects
Set Master Units to the units used by 3ds Max. To
find what units are current, choose Customize >
Units Setup. The Units Setup dialog shows which
units are used by the scene.
If your scene do es not use realistic units, adjust the
valueofScaleFactorsothescenewillbeexported
at the correct size.
The Model Size displayed immediately below
Scale Factor can help you choose the correct
scale. ModelSizeshowsthedimensionsofthe
scene geometry, not including cameras or lights.
Increasing the scale factor makes the model
larger, and decreasing it makes the model smaller.
BecauseLightscapeisaphysicallybasedrenderer,
it is essential that you export the original scene
with dimensional accuracy to obtain accurate
lighting results.
Expor ting Day light to Lightscape
Cont rols for exporting daylight are in the Daylig ht
panel (page 3–597)
of the Export Lightscape
Preparation File dialog.
To expor t daylight:
1.
If you have simulated sunlight using a 3ds Max
light, use the Light list to choose its name. If the
light is a directional light, spotlight, skylight,
or IES Sky light, Lightscape will calcu late the
daylight parameters that match the direction of
the sun based on the direction of the chosen
light.
Note: If you want to force the sun in Lightscape
tohavethesamebrightnessastheselectedlight
in 3ds Max, check Override Solar Luminance.
This will use the brightness of the light to
override the calculated brightness of the sun.
2. If no light in the scene simulates sunlight, leave
the Light field blank, and enter the scene’s
location on the ear th, the date, and the t ime.