2 UVs set and need lightmap UV slot

Question

Hi, I want to know how can I do to put a lightmap on one of my material w$$anonymous$$ch has a shader using already 2 UV slot ?

If someone got some tips with that ?

Thanks.

Answer 1

Best Answer

Answer by Paulius-Liekis · Aug 29, 2012 at 01:08 PM

At the moment you can not have more than two UV sets in Unity. So solution is either to use first UV1 for what you're using UV1&UV2 (i.e. they have to be the same), or simply do not regenerate UV2 and use it for lightmaps (in t$$anonymous$$s case UV2 has to be 0-1 bounds and has to be non-overlapping)

2 Show 8 · Share

Paulius-Liekis · Aug 29, 2012 at 01:44 PM 0

Share

Unity can generate UV2 for lightmaps or you can import UV2. So I was suggesting that you can try reusing UV2 for your effect and lightmaps as long as it suitable for lightmapping.

Paulius-Liekis · Aug 29, 2012 at 01:44 PM 0

Share

Please do not post comments as answers. Welcome to Unity Answers!

liszto · Aug 29, 2012 at 01:57 PM 0

Share

Edit with previous answer : Unfortunately, our 2 UV1 & UV2 don't have the same tilling/offset so your first solution is impossible. Then the second I don't really understand what you mean ?

Ok. I understood but my texture in UV2 need tilling and offset. And my lightmap got her own tilling/offset (in prefab information) so I think not I can do this solution too :/. This problem really stuck me é_è

Paulius-Liekis · Aug 29, 2012 at 02:07 PM 0

Share

Another solution could be packing one of your UVs into Tangent or Color channel (assuming that you're not using it for something else).

liszto · Aug 29, 2012 at 03:01 PM 0

Share

NormalMap using tangent if I don't misunderstand me. SO maybe color channel can be used. I never do something like that, did you have some example to quickly show me the idea ?

Show more comments

2 UVs set and need lightmap UV slot

1 Reply

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions