The Light Emitter

PixelWrangler
Posts: 18
Joined: Sat Mar 05, 2016 5:38 pm

Re: The Light Emitter

Postby PixelWrangler » Sun Mar 27, 2016 4:23 pm


User avatar
Marcel2586
Posts: 438
Joined: Sat Mar 05, 2016 7:42 am

Re: The Light Emitter

Postby Marcel2586 » Mon Mar 28, 2016 7:29 am

You can use a color texture and set it to green, but you have to go very low in the gain. if you leave it at 1,0000000 your neon tube shows up white.
If you set the gain to, lets say, 0,0050000 the tube will be green. use bloom in lens effects to give it a little bit of glow. turn first all other lights off, use bloom and turn all the other lights on.
As from my experience, rendering emitters with textures is much better/faster and almost no render noise

This is a test only with colors and no texture.
reality_color_no_texture.png

Render time +/- 5 minutes


This is a test only with color texture.
reality_color_with_texture.png

Render time +/- 2 minutes

I have downloaded a Neon sign with a real black background.
gatorade-neon-sign_0.jpg


Create a new plane and scale it. give it the neon sign texture.
Mat.jpg

In opacity use the same texture (click on the gear menu and select "Use Existing...")
Opacity.jpg

Chose in the light emitter the Neon sign texture (click on the gear menu and select "Use Existing...")
Mod.jpg


This is the result (render time +/- 2.5 minutes
gatorade-neon-sign.png
this would be funny if it weren't happening to me :shock:

pciccone
Site Admin
Posts: 1803
Joined: Mon Feb 25, 2013 6:25 pm

Re: The Light Emitter

Postby pciccone » Mon Mar 28, 2016 8:13 am

Thank you Marcel for the detailed tutorial.
--
Paolo

User avatar
Marcel2586
Posts: 438
Joined: Sat Mar 05, 2016 7:42 am

Re: The Light Emitter

Postby Marcel2586 » Mon Mar 28, 2016 8:20 am

You are very welcome mr. Paolo.
just having fun and a good excuse to render.

But i have a question,
Why do emitters render very well and fast with low light settings and when you use mesh lights it is terrible?
this would be funny if it weren't happening to me :shock:

pciccone
Site Admin
Posts: 1803
Joined: Mon Feb 25, 2013 6:25 pm

Re: The Light Emitter

Postby pciccone » Mon Mar 28, 2016 8:27 am

I'm not sure I understand the question. Can you give me more details and/or an example?
--
Paolo

User avatar
Marcel2586
Posts: 438
Joined: Sat Mar 05, 2016 7:42 am

Re: The Light Emitter

Postby Marcel2586 » Mon Mar 28, 2016 8:44 am

Same scene. One with mesh light rendered for 3 minutes and one with a plane turned into emitter.

The mesh light has more noise. Used a turquoise RGB color
One mesh.png


The emitter less noise. Used a turquoise texture
One emitter.png
this would be funny if it weren't happening to me :shock:

pciccone
Site Admin
Posts: 1803
Joined: Mon Feb 25, 2013 6:25 pm

Re: The Light Emitter

Postby pciccone » Mon Mar 28, 2016 8:54 am

Hi.
Have you checked with bot light sources being the same size and same position? The two examples show two different lighting setups.
--
Paolo

User avatar
Marcel2586
Posts: 438
Joined: Sat Mar 05, 2016 7:42 am

Re: The Light Emitter

Postby Marcel2586 » Mon Mar 28, 2016 9:46 am

Bummer! you are right. :lol:
this would be funny if it weren't happening to me :shock:

User avatar
Fram1963
Posts: 229
Joined: Tue Mar 01, 2016 1:52 pm
Location: Ottawa, Ontario, Canada

Re: The Light Emitter

Postby Fram1963 » Mon Mar 28, 2016 11:14 am

Thanks Marcel for this helpful tutorial!
Lyne
:D

pciccone
Site Admin
Posts: 1803
Joined: Mon Feb 25, 2013 6:25 pm

Re: The Light Emitter

Postby pciccone » Mon Mar 28, 2016 11:17 am

--
Paolo


Return to “Tips, techniques, and recipes”

Who is online

Users browsing this forum: No registered users and 3 guests