Get light to shine from underneath plastic?

Generic forum to discuss Octane Render, post ideas and suggest improvements.
Forum rules
Please add your OS and Hardware Configuration in your signature, it makes it easier for us to help you analyze problems. Example: Win 7 64 | Geforce GTX680 | i7 3770 | 16GB
Post Reply
User avatar (Default)
Dar_T
Licensed Customer
Posts: 14
Joined: Mon Feb 26, 2018 10:25 pm

Hi all,

I'm wondering how to get light to glow from underneath a plastic part where it would show when lit but then disappear when off? Would it have to be a SS material?

An example in the white text:

Image

A point in the right direction would be immensely appreciated.
Top
User avatar
bepeg4d
Octane Guru
Posts: 10321
Joined: Wed Jun 02, 2010 6:02 am
Location: Italy
Contact:
Contact bepeg4d

Hi,
I would use a Specular material with Medium node for sss, and emission node connected disconnected to medium node, when on or off.
You also need to disable Visible on diffuse, to remove fireflies.
ciao Beppe
Top
User avatar (Default)
gristle
Licensed Customer
Posts: 304
Joined: Wed Jan 20, 2010 10:42 am
Location: Wellington
Contact:
Contact gristle

Why not fake it and mix a glossy (for main surface) with a diffuse with emission? Animate the mix to turn on and off. No SSS and no risk of any artifacting.
The glow can be tuned by adding some blur to the mix control texture.
Win 10. Threadripper 1920X 32gb Ram GTX 1080Ti GTX 980Ti 2xGTX 780
http://ajdesignstudio.co.nz/
Top
Post Reply

Return to “General Discussion”