Church Window Light Effect

Hello everyone,

I want to create the inside of a church for a level in my game and I have a jpeg picture of a church window (see attachments).
My goal is to include this window into my level and have the inside of the church illuminated through this window. This should result in a very nice atmosphere and colorful light effects.
The problem is: I have no idea how to achieve this or what steps are necessary.
Could anyone point me into the right direction?

Thanks!
Christoph

 

http://unity3d.com/support/documentation/Components/class-Projector.html

You can't just color a light with the texture, but you can project the texture.

 

you can also use it as an emmisive texture(self illuminated) if you are using beast to use as a light source that is textured..

 

I've never been able to get emissive (self illum) textures to bake. I have pro.

 

I stand corrected. I can get self Illuminated textures to bake. He's a screen shot where the corridor is lit by nothing but self Illuminated lighting from the textures. There is no ambient light and there are no other light sources in the scene.

As far as I can tell, I can't get shadows and I can't get that project effect your looking for. Not sure it's possible.

 

Regardless, I've got to say, that is a really awesome-looking bake.

 

i agree, it is.

if you were to add now a direct light source with this indirect one, you will get that look that you want.

C

 

Thanks for the compliments, guys. I did it as a little test but I'll think I use something like that somewhere in my next game. It's very moody.

 

an image using your texture.
I added the direct realtime only light, with a cookie.

 

This is 100% what I was looking for!!
Could you point me towards that "direct realtime only light" property? Never came across it so far
I am on Unity 3.5 pro.
Thanks,
Christoph

 

http://unity3d.com/support/documentation/Components/class-Light.html

at the bottom the lightmapping variable. set it to real time only to remove it from the bake pass

hint: when you make your cookie for the light, have the image get slightly more blurry in the direction away from the source if you want it to look more natural.


example:



unfortunately you may have to make a custom shader to use a colored image. cookies only work as an alpha channel
all i did on this was approximate the light color in the light. an easy way to do that is to take the window image into photoshop and blur it. that will give you a good idea of what the color should be.

C

 

Thanks Cherub for following up!

I used your cookie and it looks quite nice:


The only thing I am a little confused about, is how you managed to get the colors into the cookie. I know light cookies are just black and white, but your example clearly shows that in the bottom corners your have greenish colors while the overall color is more reddish.
Did you use three cookies, one for each color? Or is there a better way to achieve this?

Again, thank you very much for your help!
Christoph

 

cool!

i used that colored texture material as an emissive light in the baking part. the colors are really only showing through where it is closest to the window and maybe sometimes a few photons will go in other places as well. you can also make the light map resolution higher on the floor around your windows. but youll have to cut up the floor unless you arent worried about memory.

also worth noting is that that reddish color is from the bake, i made the real time light bluish.(against my advice for finding the color) it just felt better to be blue.

 

Again, thanks for your help!
I never heard of "emissive light" and all I could find was this page: http://unity3d.com/support/documentation/Manual/LightmappingInDepth.html

Is there a different source where I can get infos regarding how to implement/include this emissive light thing?

Thanks!
Christoph

 

it's the same thing you did with your corridor.

 

sorry, that wasn't me

 

my bad! I think if you use diffuse self illuminated shader it exposes the emmision property.

 

Thank you very much!
This property was simply hidden behind the little options wheel!
After finally finding that and baking the scene, it looks like the example you created.
Again, thank you very much for your hints!
I will post a picture as soon as the result is really great, right now I am still fine-tuning the baking parameters.

 

interesting thing about that is that the sun seems to be several feet from the window, in which case the level should be rather hot. you should add some towels to your scene.