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DDS Transparency #405598
08/02/12 23:41
08/02/12 23:41
Joined: Jul 2008
Posts: 168
8
82RJZAE Offline OP
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82RJZAE  Offline OP
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Joined: Jul 2008
Posts: 168
Hi, I have a DDS colour map and I would like to have a specular map in its alpha channel. I placed the spec map in the alpha channel using Photoshop and exported it as DDS DXT5. However, when I import it in MED as a skin the Texture Format section is disabled and I cannot convert the DDS image to 24bit to remove the alpha transparency so that it doesn't make the model transparent. Is there something I am missing? Perhaps when I exported it as a DDS in Photoshop?

Re: DDS Transparency [Re: 82RJZAE] #405599
08/03/12 05:59
08/03/12 05:59

C
chris_oat
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chris_oat
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C



i always save them in DXT3 in GIMP, although DXT5 should work as well for alpha channels but never tried it.

Re: DDS Transparency [Re: ] #405602
08/03/12 06:22
08/03/12 06:22
Joined: Jul 2008
Posts: 168
8
82RJZAE Offline OP
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82RJZAE  Offline OP
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Joined: Jul 2008
Posts: 168
I believe both should store the alpha channel; however, when I use it as the skin in my model it shows up in the engine with the specular map as its transparency. In other words, the model appears see-through. In other models I have used I was able to set the colour map to a depth of 24bits (instead of 32bit) so that the alpha channel wasn't displayed as a transparency-- except I can't do that with DDS for some reason.

Re: DDS Transparency [Re: 82RJZAE] #405605
08/03/12 07:35
08/03/12 07:35

C
chris_oat
Unregistered
chris_oat
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C



well i cant say anything about PhotoShop but in Gimp you do the following:
- Open your defuse, normal and Spec map
- save your defuse as DXT1 and close it.
- now copy your spec map
- add alpha channel to your normal map
- add layer mask to your normal map
- paste spec map on it
- anchor layers!!!
- save as DXT 3 (or 5 sould work aswell)
- Done!

in Gimp i dont worry about setting 24/32bit manualle as this is done alredy by setting betweet DXT1-5.


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