Jump to content
XOP15

Light Bulb

Recommended Posts

Hello Team,

 

Does anyone have any tips for lightbulbs and rendering them ? I am trying to achieve the glass bulb effect shown in the attachment, my previous attempts just look like globes or spheres, any tips gratefully received 

 

Dave.

 

BULB REF.png

Share this post


Link to post

If you're going to get THAT close, regular glass reflectivity and transparency for the bulb, with a glow texture applied to the separate filament geometry inside. No backlit effect on the bulb glass if you want it to remain transparent as it is in this image.

In the Indirect Lighting options for the glass texture, make sure to enable Portals so that it properly calculates light passing through the bulb surface.

Indirect Lighting will need to be enabled in your renderworks mode in order to see the glow texture properly.

  • Like 1

Share this post


Link to post

I'd try and Image prop with a few small line lights.

  • Like 1

Share this post


Link to post

There is a video in VW that I saw with just this item and also a coiled cable in a corner of an old room, will look or maybe Louis will recall it. Will look around.

Edited by Alan Woodwell
  • Like 1

Share this post


Link to post

Wasn't there something like a coiled row of balloons to in the VSS video section ?

  • Like 1

Share this post


Link to post

Have you looked at Building Services/Realistic lamps?  That might not be as decorative as you would like, but could be a start. 

If you're refining a reflexive texture, having an environment to reflect and a specular light source can make all the difference. 

 

-Josh 

  • Like 1

Share this post


Link to post

I just took this on last week, but in Cinema 4D with Corona renderer, not Vectorworks.

 

Make sure you are working with real world scale.

Make sure your glass envelope has the correct thickness.

So much of this is in the lighting - it's all about the lighting!  There are what looks like three soft boxes lighting your example - warm light from the left and right and a cool top light.  You can see it in the reflections.

Probably need to get the glow on the filament working well in post via aftereffects or photoshop.  I used a luminous texture in Corona with Bloom and Glare effects turned on in the camera.

 

Attaching my attempt.  Good luck - it would be a tricky thing to get right in renderworks. Edison Bulb model by Fabiovalle3D via Turbosquid.

EA_Edison.jpg

EA_Edison_clay.jpg

Edited by EAlexander
  • Like 3

Share this post


Link to post

EA: So many helpful tips in your post above, thanks. It IS all in the lighting!

Share this post


Link to post

Hi Guys,

 

Thanks so much for all your posts and tips, this has really helped me, Some of the tip produces great results but render time is huge, I'm still tinkering to find a happy balance....... My project has 22 hanging light bulbs so render time is important, hopefully i'll be able to post my final result here soon,

 

Thanks once again 

 

Dave :)

 

Share this post


Link to post

If you are doing that many, clearly the lamps are going to be fairly small and if render times are important, then I would use an image prop. I've done this a few times and it works. It's not nearly as elegant as some of the above suggestions but you can get the point across. Perhaps a little post work to tart it up. 

 

These are trade-offs, but that is what I would suggest. 

Share this post


Link to post

This is where "Lens Effects" in C4D could be used. They're sort of like image props for lights.

(I'm sort of surprised this hasn't been wish listed. It would be useful for many visualization needs in VW.)

KM

Edited by Kevin McAllister

Share this post


Link to post
20 hours ago, Kevin McAllister said:

This is where "Lens Effects" in C4D could be used. They're sort of like image props for lights.

(I'm sort of surprised this hasn't been wish listed. It would be useful for many visualization needs in VW.)

KM

OMG!! I'm ready for that in VW NOW!

Share this post


Link to post

I wish there were results to share, Bulb has been sidelined as the project changed, will still try to model it though for my own findings & learning :)

 

 

Share this post


Link to post

Wanted to see how close I could get to that render from scratch in a blank doc in 20 minutes, the answer was this, lol:

Screen Shot 2017-10-03 at 5.17.21 PM.png
But i'll take it all the way through tomorrow most likely and add the filament, glow, cabling and a real environment as opposed to this quick studio-ish background reflectivity and share the image and file I end up with.

  • Like 2

Share this post


Link to post

HI Jim,

 

Thats not bad for 20 Mins, I would think it would take me about 20 hours just to get to that stage ! I look forward to seeing your finished render, was all this done in VW ?

 

Thanks

 

Dave.

 

Share this post


Link to post

Yup this is raw VW, an eyeballed sweep for the body of the socket off of your image, i didn't try to trace or anything just slapped the shape together. A few extrudes and tapers added for the knob and knurled collar of the socket, the knurling i got with a quick displacement mapped texture, i COULD have done it with Surface Array for more precision but that would have taken me much longer. Then a render style with a studio light background and a refractive glass transparency and glass reflectivity for the bulb.

Attaching the WIP (Don't judge my madness too harshly!) but I absolutely botched the bulb shape with a misplaced Deform of a shell object. I'll redo that part from scratch, Im sure I can match the bulb shape perfectly including the little nub at the end with some more effort. For the filament i plan to use a NURBS curve derived from some duplicated 3D loci to get that 3D zigzag pattern, then a super thin extrude along those curves to get the filament and we'll see how the light from making that glow plays against the shelled glass bulb, which is the part i'm really interested to try.

For the cable, probably a new Cloth shader type on top of an extrude along path/helix spiral combo.
 

Edison_Bulb_-_WIP1.vwx

Share this post


Link to post

Glow on the filament didn't turn out too shabby! Spent maybe another 30-40 minutes poking and prodding, honestly the bulb body took me the longest because I wasn't (and still am not) happy with the little nub on the end. The final render once tweaked was only a few minutes but I didn't keep close track of the render time. Nothing crazy though, under 3 mins I think:

 

Screen Shot 2017-10-03 at 8.33.24 PM.png


Just had to amp the filament light appearance up a smidge with a Renderworks camera set to add Bloom and a bit of Exposure to the viewport. The geometry of the filament could easily do with a little more fleshing out, adding the supporting thin glass rods and non-glowing wire but I mostly just slapped the filament itself together as a proof of concept.

The cable was a simple Model > 3Dpowerpack > Helix Spiral that I duplicated with the rotate tool to give it a twin. More could be done here adding a few shadowless caustics-only light objects to get some caustic effect, more detailed background, or a few decals to get the sort of smudging you see in the original, but for now it's bedtime. File attached for dissection, please feel free to use any and all parts of it for your own work.
 

Edison_Bulb.vwx

 

  • Like 4

Share this post


Link to post

A great challenge and here's my attempt! Didn't take long to model but honesty you could take all week tweaking the rendering. I spent about 90 minutes on this not including rendering time. The final render at 300dpi on a sheet layer takes 10 mins.

Somehow Jim's is livelier.. 

 

Cheers,

Peter

 

Globe challenge.png

Edited by Peter Neufeld
Couldn't help myself post a better image. Rendering does that to you.
  • Like 3

Share this post


Link to post

O.o Wow. Impressive. And great timing too as I am designing a restaurant right now where I will be using bulbs like this.

Share this post


Link to post
On 10/5/2017 at 3:00 AM, Peter Neufeld said:

Somehow Jim's is livelier.. 

 

That might just be my addition of a Glow effect via the Renderworks Camera. It makes the reflections shining off the glass and the glow of the filament "pop" a little bit more. In scenes with white surfaces, polished surfaces, or anywhere light glints off a reflective surface it seems to add quite a bit of character without adding a lot of render time. You're looks a little more authentic/period than mine however, I like it!

Share this post


Link to post

Hey Jim,

 

Looks brilliant, really really smart....... I love the filament glow too, thanks for the post of your file too, I'll have a good look through it :)

 

Cheers

 

Dave.

 

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

 

7150 Riverwood Drive, Columbia, Maryland 21046, USA   |   Contact Us:   410-290-5114

 

© 2018 Vectorworks, Inc. All Rights Reserved. Vectorworks, Inc. is part of the Nemetschek Group.

×