CHAPTER 12
Global Functions: Collage Generator™ Effect
136 DL.3 Digital Light User Manual
11. Use Modifier 3 to adjust the vertical size of the output, stretching and compressing it to
adjust for the size of the sphere, keeping the vertical size of the grid filling the output
without clipping the image.
Correct for the flat to round surface distortions
12. On the Graphic Effect Mode channel set to Spherical Control 2 (DMX = 254), use the
associated Modifier 3 to compress the grid edges adjusting the bend in horizontal grid
lines. This adjustment should not be used to fill the projector output horizontally. Instead, it
should be used in conjunction with the Spherical Mapping Global Effect Modifier 1 to control
the longitude angle of the projected image. Global Effect Modifier 1 should be maintained
close to the theoretical longitude angle.
13. Use Modifier 1 and Modifier 2 to adjust the amount of bend, up or down, in the horizontal
lines of the grid. Modifier 1 controls amount of correction. Modifier 2 controls where the
center of correction occurs.
14. If the spherical mapping effect is being used in conjunction with the Collage Generator
effect, select the Enhanced Collage Generator option (DMX = 141) in the other Global
Effect channel now. Set the appropriate grid size and grid elements selected with the
internal collage alignment grid enabled. Go back through steps 1 through 11. Remember
that pan and tilt adjustments are also available when using a DL.3 or DL.2 fixture.
Now you have a rough adjustment of the spherical mapping effect. From this point, finely adjust
all the parameters until you bring the output to the desired shape.
When fine tuning Spherical Mapping adjustments, remember the following:
• The Graphic Object effect 253 Modifiers 1 and 2 have a major influence on the shape of the
vertical lines.
• The Spherical Mapping Global Effect modifiers can be used to provide fine control of the sha pe
of the vertical lines, but should be within several degrees of the expected latitude and
longitude values.
• The Graphic Object effect 253 Modifiers 1 and 2 are used to finely adjust the vertical bend in
horizontal lines.
Spherical Mapping Tips
• If the fixtures are arranged symmetrically around the sphere, the adjust ment made to the
various control Modifiers of Global and Graphic Spherical Mapping effects with be the same or
nearly the same when the fine tuning is complete. You can save time by selecting the Modifier
on all the fixtures you are using for the collage and making each adjustment on all the
fixtures together.
• Projector Pan, Tilt, and Zoom also affect alignment.
• Don’t make small changes until the alignm ent is roughed in.
• When alignment doesn’t seem to be working, record and store you current settings, then go
back to the default values and begin again.
• The longitude angle is the angle between fixtures from the vertical axis of the sphere and
should be defined in your lighting plot. The plot should also give you a good idea of the
latitude angle. The final values and those theoretical values should be close.