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Dynamic Lightmaps

Started by riksweeney Aug 7, 2006 at 3:45 PM 3 replies 1.1k views

Original Post

Aug 7, 2006 at 3:45 PM

Hi, I want to use dynamic lightmaps in the game that I'm writing. I'm a bit stuck though as I'm using multitexturing, so I have my texture map on my first texture unit and my lightmap on my second texture unit. What do I need to do if I want to use a dynamic lightmap texture? I can't put it on the second texture unit as I'll then lose my lightmaps. Does anyone has any suggestions? Thanks Richard

Digitalfragment

101

Digitalfragment

Aug 7, 2006 at 8:48 PM

Do your dynamic lights as a secondary pass using additive blending.

Idealistically thought, you want to be able to combine all of your diffuse lighting in the one shot before multiplying it with your base texture though, but that depends on what kind of scene you are going for.

Ro_Akira

Aug 8, 2006 at 5:36 AM

Presuming you have a static lightmap pass also, I would suggest:

1. Static lightmap pass
2. Additive blend dynamic lightmaps
3. Modulate diffuse textures

riksweeney

Author

riksweeney

Aug 8, 2006 at 3:03 PM

Thanks for the suggestions, I'll give them a try.

Richard

PlayerX

Aug 8, 2006 at 3:56 PM

Most modern graphic cards support at least four unit multi-texturing. Only olders ones are limited to two, and you could always forgo the dynamic lighting for those as the "price" for having an older card.

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