Cubemap lighting demo

[BNA!]

der_ton, a user of my boards has written a nice small demo, just in case anyone here is interested:

http://www.doom3world.org/phpbb2/viewtopic.php?t=2548



Have fun or forget about this post.

 

[xGL]

Very good job!

Here's a screenshot I took on an XGI Volari Duo card:

 

[991060]

The cubemap is used for what? depth map?

 

[Anteru]

No, but for lightning. This demo shows the same effect you can see in the UE3 demo - the "soft shadow" lightning.

 

[christoph]

hey bna,
do you have a link where the technic is described?
looks good, heres another shot

 

[BNA!]

The author has provided more info in this thread:
http://www.doom3world.org/phpbb2/viewtopic.php?t=2547

For further info, email him pm him or post a reply on doom3world.org - I'm just the messenger

 

[Humus]

No, but for lightning. This demo shows the same effect you can see in the UE3 demo - the "soft shadow" lightning.

I didn't work for me, but judging the description and screenshots I think it's not quite the same. AFAICT this uses a cubemap containing the light image from the latern and projects it across the room. It will give cheap soft shadows from the latern, but it won't give you soft shadows from the guy or from any other objects in the scene.

 

[BNA!]

It will give cheap soft shadows from the latern, but it won't give you soft shadows from the guy or from any other objects in the scene.

That's exact!

 

[KimB]

Finally downloaded and ran it. Looks pretty good, and the colored lighting does look quite nice.

 

[der_ton]

Thanks for the feedback guys.
The issue with some Radeons is solved, it will most probably work for you too, Humus.
And it works on hardware with two texture units and DOT3 now, too.
The rar package was updated:
http://home.tiscali.de/der_ton/cubemapdemo.rar

 

[Humus]

Works fine now.