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LED Bar emitting light only as point source


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On 2/23/2018 at 5:30 AM, Steve Clarkson said:

So here's what I've come up with...

It uses 12 spot elements and 1 linear light.  I used the linear light to somewhat overcome the dark zone right at the exit of the fixture.  I've also splayed the 12 elements to reduce the brighter convergence area in the middle.  In order to allow for 3D rotation, I've left it as a group of symbols.  Haven't tried putting into a real project yet, we'll see how it affects render time and workflow, it's a little clunky I know, definitely fun getting into custom objects.

I'll post the file if anyone's interested.

LED BAR-latest.PNG

Well dang, I am!! When I have time, I actually like building these kinds of things. Thanks man!

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Edited by mjm
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I would add that linear lights can add significantly to render times as I believe the tool adds a number of lighting object along the linear path. Unfortunately the solution to your issue is Maxon allowing VW users to have reasonable and useful control over lighting objects. How infuriating is it to go through all of that work only to end up with a beam of light that gets brighter the further away it is from it’s source. Not the BEAUTIFUL work on that rendering of the Svoboda fixtures (extra props if you know who Josef Svoboda was and why he is SO important to modern day lighting design and video projection....) It really is a beautiful render, but in what universe (to quote Sheldon Cooper) do beams of light get brighter the further they travel?  That should be a brilliant hot spot at the fixture falling off in an exponential way as the beam travels in the air. Having to compensate with something like a linear lighting element is just a resource hog, but serious kudos to you to try and get that going Steve. Well done sir. 

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klawson - ya I tried an area light too, they're pretty close in the affect they have for this purpose.  My linear light is a rectangle placed barely above the exit of the shell, similar it sounds to your area light.  And ya I agree.... it's sorta the real thing.  I tried lowering my linear light into the enclosure hoping for a shuttering effect, but all it did was block all light, have you tried anything like that?

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27 minutes ago, Steve Clarkson said:

klawson - ya I tried an area light too, they're pretty close in the affect they have for this purpose.  My linear light is a rectangle placed barely above the exit of the shell, similar it sounds to your area light.  And ya I agree.... it's sorta the real thing.  I tried lowering my linear light into the enclosure hoping for a shuttering effect, but all it did was block all light, have you tried anything like that?

If you place it inside the symbol it will need to have a transparent surface to let the light out.

I just placed it a slight bit above the geometry so it was clear.

You could eliminate some of the geometry to allow fr the shell to remain and your linear light to be within the shell. No one is really going to notice that the top of the fixture is "ripped" apart. :D

 

Kevin Lawson

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Well I'm still at it, this time it's a glowing texture at 1000% set into a mirror-texture lined case, with one spot light set to 10deg beam with 90deg spread, smooth falloff, lit fog.  Way easier on the rendering and not too bad for coverage, though the falloff goes on a bit.  Decent realism on the drape I think.

LED BAR easier.PNG

Edited by Steve Clarkson
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Nice Steve!  If you want to gain some more control from your glow texture, you could try creating your light fixture as a hollow object and a texture that DOES cast shadows. Place a lens on it that does not cast shadows and then move your glow texture in/out of the light fixture “trough” until you get the effect you want. That will allow the fixture to act as barn doors. 

 

Really nice work and dedication to the result!!

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Thanks guys! 

I probably seem pretty obsessed with this kind of light, but we use them VERY frequently on corporate shows, and it's the only thing I've found in VW so far that doesn't come out looking realistic.

scottmoore -  sounds good, I'll try that next.

Edited by Steve Clarkson
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One question for you guys, I've made this 15 Objects into a group, and a symbol, and in none of those 3 states could I convert it to an Instrument (Lighting).... is it possible somehow?

More info - 12 of those objects are themselves 3D symbols, should I deconstruct them and then re-group the whole mess?

 

UPDATE:  So I broke it all down to base components, created a symbol, attached the instrument records, and still couldn't get the option to create a lighting instrument....UNTIL I switched to 2D/plan view.  Go figure.   I also tweaked  the brightness again.

LED BAR easier 2.PNG

Edited by Steve Clarkson
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23 hours ago, Steve Clarkson said:

One question for you guys, I've made this 15 Objects into a group, and a symbol, and in none of those 3 states could I convert it to an Instrument (Lighting).... is it possible somehow?

More info - 12 of those objects are themselves 3D symbols, should I deconstruct them and then re-group the whole mess?

 

UPDATE:  So I broke it all down to base components, created a symbol, attached the instrument records, and still couldn't get the option to create a lighting instrument....UNTIL I switched to 2D/plan view.  Go figure.   I also tweaked  the brightness again.

LED BAR easier 2.PNG

Steve: Thats  good looking!

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