Go Back   Lightwave Community at SimplyLightwave > Lounges > LightWave Basics
Register FAQ Members List Calendar Mark Forums Read

Reply
 
Thread Tools
Old 02-07-2004, 08:54 PM   #1
drdoe
Full Access Member
 
Join Date: Mar 2004
Posts: 22
Default light reflection?

I'm modeling my own living room (just for fun), and I want to render it as it looks when lit only by the light coming thru the windows. But in order for that to happen, the light needs to be reflected by the white walls and the floor an such.
How do I acomplish that? Setting reflections for the textures just makes everything light up a bit, but of course then everything also reflects obejct geometries (which a wall usually doesn't)...
drdoe is offline   Reply With Quote
Old 03-07-2004, 02:08 AM   #2
rich_is_bored
Full Access Member
 
rich_is_bored's Avatar
 
Join Date: Jan 2003
Posts: 174
Default

In real life a single light source can illuminate an entire room. The reason this happens is because the light bounces around. This effect is called radiosity.

You've got two options. You can either fake it by adding small lights all over or you can enable radiosity and turn up the number of bounces.

The only downside to using radiosity is it slows down your renders trememdously. Also, the more bounces the longer it takes to render.



The above image is an example of increasing the number of bounces.
rich_is_bored is offline   Reply With Quote
Old 03-07-2004, 03:36 PM   #3
drdoe
Full Access Member
 
Join Date: Mar 2004
Posts: 22
Default

Of course!
I know about the radiosity function, but I've never really known what it did. So far I've used it to give renderings a slighty grainy look, because that was all I could see it it doing. I kinda figured that radiosity was built to be a grain-filter, but I had no idea what... I'm such a n00b

Thnx for the answer!
drdoe is offline   Reply With Quote
Old 04-07-2004, 07:25 AM   #4
HAZCHEM
Registered Member
 
HAZCHEM's Avatar
 
Join Date: Jan 2004
Location: Brisbane Australia
Posts: 100
Default

Hey man if your geting a grainy image you can enable HDR exposure in Image Editor under Processing --> Add Filter and alos i think you have to enable it in Image Processing also try bluring your image that you using by enableing Full Percision Blur in Image Editer under, filters.

And rember if you want radiosity to work the best you will have to use a HDRI image. Hope that helps.
__________________
HAZCHEM is offline   Reply With Quote
Old 04-07-2004, 08:46 AM   #5
drdoe
Full Access Member
 
Join Date: Mar 2004
Posts: 22
Default

thnx the the info, hazchem

However, I actually like the grainy quality I often get with radiosity so I don't think I'll mess with it this time around
drdoe is offline   Reply With Quote
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
reflection pass sasooo Rendering, Lighting, Texturing and Effects 0 29-09-2004 11:49 AM
Light From Above Sarkaz W.I.P 11 04-03-2004 12:39 AM

Thread Tools

Forum Jump




Online since 2001
A good place to start for a newbie
Catch up with SimplyLightWave
SimplyLightWave was first started in London 14 years ago, and we've been dedicated to producing quality software training ever since. Faithful to the principle of learning by doing, our project based courses aim to give you the practical skills to quickly start creating your own work in LightWave. More...
Copyright © 2001-2018 SimplyLightWave | Terms & Conditions | Privacy Policy
/* Contact Form */