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Linear Light Best Practices


trashcan

Question

I have art lights that I want to insert diffused type lamps in for my renders. 

 

Here's what I've done:

  1. Modeled my art light's hardware
  2. Put a rectangle inside of the art light
  3. Converted the art light to a line light

 

Here's what that looks like:

image.thumb.png.80cbe4a404a54266d3c2171bcbb05b3f.png

 

The quality of light is closer to a non-diffused LED strip light than it is a diffused light.

 

In order to get a more diffused, uniform look, I cranked up the brightness values, the dimmer and changed the falloff to NONE. 

 

image.thumb.png.dc5012d97722da4ec9d99254b5b9a548.png

 

Looks pretty good. 

 

A couple of notes about using these types of lights that's helpful:

  • This help article is useful
  • These lights will only render in Renderworks modes ("shaded" will not work)
  • When you change light settings in the OIP, your entire canvas disappears consistently. Just switch to shaded and then back to your render mode and things will re-appear. This must be a bug!
  • Turning off "render geometry" does exactly that in the OIP.

 

A little confused that the light still is treated as many individual lights (at least that's how reflections are interpreting it):

 

image.thumb.png.d0df54f4c84b389239805577538e5598.png 

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37 minutes ago, trashcan said:

I have art lights that I want to insert diffused type lamps in for my renders. 

 

Here's what I've done:

  1. Modeled my art light's hardware
  2. Put a rectangle inside of the art light
  3. Converted the art light to a line light

 

Here's what that looks like:

 

image.thumb.png.80cbe4a404a54266d3c2171bcbb05b3f.png

 

The quality of light is closer to a non-diffused LED strip light than it is a diffused light.

 

In order to get a more diffused, uniform look, I cranked up the brightness values, the dimmer and changed the falloff to NONE. 

 

image.thumb.png.dc5012d97722da4ec9d99254b5b9a548.png

 

Looks pretty good. 

 

A couple of notes about using these types of lights that's helpful:

  • This help article is useful
  • These lights will only render in Renderworks modes ("shaded" will not work)
  • When you change light settings in the OIP, your entire canvas disappears consistently. Just switch to shaded and then back to your render mode and things will re-appear. This must be a bug!
  • Turning off "render geometry" does exactly that in the OIP.

 

A little confused that the light still is treated as many individual lights (at least that's how reflections are interpreting it):

 

image.thumb.png.d0df54f4c84b389239805577538e5598.png 

Was just dealing with this myself yesterday. Agreed on all the above. I was mocking-up ring light, & could not get the line light to produce  attractive usable output (actually lighting a subject, like irl, not just glowing) even tho I upped the output to something like 500%, so switched to adding another source to fake the output, something I hate to do.

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Have you tried using a Glow Texture instead of Line Lights? 
 


Back in 2017, former Vw employee @PVA - Admin JimW had this to say about Line Lights in the thread linked above: 

Quote

Line Lights are splotchy and there isn't much we can do to fix it. The object is considered to be deprecated in most cases and I don't think it will be getting any love anytime soon. 

 

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2 hours ago, Mark Aceto said:

Line and Area Lights are more or less obsolete, so the best practice is to use something else (like the glow texture above).

Ah. Yes, thanks. I hadn't used em in some time, now I remember why.

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