#Glowing Think Ideas?
5 messages in this thread
Hi: I'm working on a project at work where I'm modeling an inductively heated
block of carbon that goes from cold (a semi-shiny black) to a brignt
incandescent yellow color. I'm doing a morph from the black to an intermediate
glowing red to the final yellow color.
That works fine but… When an object gets that hot it should emit light, and
that light should show up on the nearby objects. I can get the glow in the
material itself by making it self-illuminating but I'm having trouble getting
the light to look right on the other objects.
I've used an omni light that changes color along with the carbon block, but
without shadow casting light ends up in strange places. My current option is to
use a set of 5 spotlights set up to just barely overlap.
It's running now (so I haven't seen it) but I can't get it to run with
ray-traced shadows (I get a page fault on the first field).
Does anybody have any suggestions on how to get the effect that I need?
Thanks,
Chris
– Chris Johnston, Written 25-Sep-1995 @ 20:42:18
Using: Windows NavCIS PRO 1.62
Chris,
>> I've used an omni light that changes color along with the carbon block, but
without shadow casting light ends up in strange places <<
Are they seperate objects? Then just exclude them from the omni lights.
If they are parts of the same object, maybe you could use omni/ranges and
attenuation to keep the light where you want it. Or, break the object into
seperate objects and exclude.
Paul S.
Paul: There are a number of seperate objects, but the ones that cause the
problem are big enough that part of them should be shadowed and part
illuminated. The other complication is that the part that glows is jacketed by
a pair of coaxial quartz tubes. Splitting them would solve the shadowing
problem but then I would have to deal with the seam.
I'll look at ranges and attenuation – that might help a lot.
thanks
Chris
– Chris Johnston, Written 26-Sep-1995 @ 19:59:14
Using: Windows NavCIS PRO 1.62
if I understand overshoot correctly (perhaps someone could correct me if I'm
wrong) I think it might be worth trying to use a spotlight (or a few) with
overshoot set on, as this will make it act a bit like an omni light whilst
still allowing shaddows and projector capability.
-john-
DAS.
John: Good idea! I'll take a look at overshoot.
Thanks
Chris
– Chris Johnston, Written 26-Sep-1995 @ 20:00:40
Using: Windows NavCIS PRO 1.62