Fake Realtime Global Illumination

Hello guys, yesterday I had the idea to create a fake GI (Radiosity), calculating a grid, and casting rays from it, it is really simple, it works by getting the ray hit pixel color, and applying to a Point Light, which is positioned at the ray hit position, you can enable or disable shadows for the Rad Lights, and also "bake" the lights positions to consume less resources, take a look.

Disabled


No Shadows


Full(With Shadows)


I'll just revise the script to optimize, and then I'll release it in here.

For the future:
*Add support for Spot and Point lights
*Add saturation control
*Add light bounces
*Search for a faster way to do shadows

 

Hi I don't think you added the attachments correctly as they are showing invalid for me.

 

Fixed, thanks!

New pic:

 

Looks great. Out of interest what is the performance difference between those 3 pics. What impact on performance is there using the shadows ? Also is the idea going to be that it is just a script that you can add to a camera ? It would be great if it was easy to just enable or disable the effect based on the performance of the pc that it was running on so that it would be disabled if the frame rate dropped too much.

 

Disabled I got 50~60 FPS, Without shadows I got 30~40 FPS, Shadows on I got 20~30 FPS, I still got a lot to do and optimize, but it is a single script that you attach to your Direct Lights, I'll work on it for Point and Spot lights, it's fully customizable, from shadows to intensity, and you can also change the grid scale and the ammount of rays to be casted (and lights to be created).

 

You started yesterday? Yesterday I thought of how to discard pixels in a checkerboard style! looks amazing, do you mean with the third picture that the shadow was also calculated with your GI script?

 

Yeah, Like dissolving? It must be looking awesome! well, the script only creates lights and then it change the position and the colors, all the shadows are Unity Shadows, everything on these pics are done realtime.

Added Light Bounces:




With Shadows:

 

This is amazing!

 

Interesting...

 

Well not even close to that Thank you for the info. Are you getting those fps numbers in forward or deferred rendering?

 

Nice.

I wondering how this compares to the upcoming Enlighten?

 

I'm pretty sure if you check the asset store forum there is already someone far along in development of a system basically the same as this, firing rays to find sample points and then adding extra light sources. Your example scenes are almost identical.

 

I thought the same thing: http://forum.unity3d.com/threads/20...lumination-For-All-Versions-Of-Unity!-(W-I-P)

 

Except if the OP tech based on reflective shadow mapping then it would be different

 

Was this script released? Where can I find it?

 

i like it for my last walkable room be nice i have so tool

 

Can you please post this script!

 

Indeed , i just released the demo of the new version that has 2ond bounces too

GI Proxy is the asset

The whole idea of adding lights is simple, but tweaking it so they appear smoothly and look like GI than blinking lights is a lot harder

Also you cant add a huge number of lights, so there are many other methods needed to handle their creation properly.