Mixing dynamic and precalculated lights

ebol666 · Post by **ebol666** » Sat Sep 16, 2006 12:12 am

Hi!

I was trying to do something like this: a test map, a room, lightmaped, 4 omni lights, one in each corner. The room is not complelty lighted, the center of the room is dark, and the corner areas are brighter.

Now, I want to add a dynamic light to the scene (the light radius doesnt cover all the room), but I want it to just light the scene... I cant explain it right

I mean, when the dynamic light is in the one corner of the room this area is getting more lighted, but the rest stays the same.

Unfortunally I couldnt manage this, since the dynamic light makes the entire area that its out of its range darker.....

I hope one will understand what I ment to say by that

Anyway, whow can this be done? I worked with my3d file format... Any sugestions ?

cheers!

TheC · Post by **TheC** » Sun Sep 17, 2006 6:03 am

Could you get some screenshots of this?

hybrid · Post by **hybrid** » Sun Sep 17, 2006 8:36 am

Use ambient light to make the world a little lighted. And use lighting affected lightmaps to get static and dynamic lighting.

ebol666 · Post by **ebol666** » Sun Sep 17, 2006 11:17 pm

Thanks for the reply

Actually I did what hybrid sugested before writting previous post, but I wasnt really happy with the results... Anyway, heres some screenshots:

This is a top view of a lightmaped model (no dynamic light):

And this is with the dynamic red light placed in the midle of the view (white rectangle)

Well, it doesnt look bad, the area that is out of the lights range stays the same, but same hapens with the center of the scene... Is stays dark, as it was without the dynamic light

Only the bright areas seem to react, its a pity, since i was really looking forward to lightup the dark parts...

Is it even possible

omaremad · Post by **omaremad** » Fri Sep 22, 2006 6:23 pm

additive lighting would be the solution since (lightmap=0)*(dynamiclight==1) still = 0

however 1 + 0 = 1

and if both are bright then the result is 2.

irr uses multiplicative lightmaps

hybrid · Post by **hybrid** » Fri Sep 22, 2006 7:13 pm

I guess that LIGHTMAP_ADD does not mean multiplication

omaremad · Post by **omaremad** » Fri Sep 22, 2006 8:21 pm

Thats adds the light map colour to the diffuse texture, i was talking about adding the dynamic lighting colour with the lightmap.

hybrid · Post by **hybrid** » Fri Sep 22, 2006 9:01 pm

So the solution would be a LIGHTMAP_ADD_LIGHTING? Since ADD would remove the 0 and lighting would add dynamic light.