Lightmap with 16bit floating point per channel

Unity Engine
1

Dear forum,

I cannot find any solution to use my beast or external lightmap with 16bit for channel texture.

I think it is very important above all for the hdr bloom and tonemapping. Infact I don’t understand how it is usefull 32bit buffer if my lightmap are in 8bit per channel.

Thanks

2

Nobody?

3

Up

4

Unity lightmap importer encodes RGBE, where the alpha channel is a shared exponent for the RGB channels (as opposed to each channel having its own exponent in a 16bit per channel float texture). A lot of HDR formats do the same.

5

Thanks Owen for your support!

At this point I quote another thread I opened http://forum.unity3d.com/threads/171028-Unity-Import-Type-Lightmap-Alpha-Bug?p=1169199#post1169199
about Alpha on Lightmap. It is shared with this question …

So when I import an Lightmap with encoded RGBE, why unity delete my alpha channel and replace with a gray 128 on android build setting?

Thanks