#Lighted colored glass?
5 messages in this thread
Lightwave users,
Maybe some of you pros out there can help me out. I'm making a 3D rendering
of a city which includes traffic lights. I'm trying to make an illusion at
this crossroad where you can see the red, yellow, and green of the traffic
light, but one of them is clearly lit and illuminated.
I've made the traffic light objects transparent and in the obvious colors
with a light behind the one that is supposed to be lit. It doesn't seem to be
working. The rendering is just turning out null. Any ideas of how I can
simulate a light shining through a colored glass dome such as on a traffic
light? By the way I have tried the color filter, no effect. Using 3.5 LW.
Flapping my 28.8 wings at 14.4 speed with AutoPilot on the CS Net
Chris Shepard: 030/50 Toaster A2000 & MacIIfx via Emplant.
Try putting a light in FRONT of the traffic lens with glowing lens flare
enabled.
later, Jim
Chris:
The problem is that the light in LightWave, and any other 3D program is
"virtual light". Even if you point a spotlight directly at the camera, you
cannot "see" this light.
Anyway, Lens Flare should do the trick here. I'd use three point source
lights, parented and positioned just in front of the light fixture. One light
color red, one yellow, and one green. It's also a good idea to rename each of
these lights something like signalYellow, etc. to keep track.
Once they're positioned, go back to the lights menu and set all the intensity
values to 0%. Next, you want to get an idea of how much light each lamp will
throw onto the fixture itself. Remember, here you're just simulating the
amount of light the lamp will throw when "turned on". Try some different
intensity values for each light. Once you're happy, set the intensity falloff
(5 or 10% should do). Doing this will prevent the point source light from
falling onto any other objects in the scene.
You mentioned the yellow light, so select that light and click on "Lens Flare"
and then Flare Options. Turn off all of the options except for "Central Glow".
Since your light color is yellow, the flare will have a yellow tinge, too. The
default flare intensity is 50%, which is likely way too high, so ease it off a
bit, and try some test renders until you're happy with the effect.
Now, to complete the illusion of a working traffic signal, you need to add
envelopes to the light and flare intensity settings turn turn the lights on and
off.. After setting up an envelope for the light intensity, you can save it,
go to the flare options and load the same envelope for the flare intensity (a
little time-saver). Just use the intensity figures you came up with for the
maximums.
Of course, if this is just a still you're doing, you don't have to use any
envelopes, nor the extra two lights, but you may want to save the pieces for
use in an animation later.
The 3D lighting in LW is pretty good, but sometimes, a little extra work is
needed. Also, it's quite common for two or more 3D lights being used to
emulate a real light fixture.
Hope this helps, and that you'll upload a JPEG of your work, eh?
Cheers!
Trent/ReAnimators
Chris:
If you want somthing to look like it lites-up. I'd use luminosity on the
surface. forget trying to light it.
Brad Hayes
Hayes Visual Communication
>>I'd use luminosity on the surface. forget trying to light it.<<
Well, yeah. There's that too…
Trent/ReAnimators