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Using DDS for Normal Map and Spec Map #208430
05/27/08 12:09
05/27/08 12:09
Joined: Feb 2007
Posts: 46
United Kingdom
marcwakefield Offline OP
Newbie
marcwakefield  Offline OP
Newbie

Joined: Feb 2007
Posts: 46
United Kingdom
I am using dds textures on my model as it seems to be the format with the smallest file size and I am trying to keep my model under 20mb before releasing it to the comunity.

I have run into an issue though; For the skin texture dds works great enabling me to have a 2048 by 2048 texture with a minimal file footprint but when I try to use dds on the normal map it wont let me assign an apha map to control the specularity.

Does anyone have any suggestions?

Thanks in advance.

Marc Wakefield

Re: Using DDS for Normal Map and Spec Map [Re: marcwakefield] #208431
05/27/08 12:28
05/27/08 12:28
Joined: Jun 2004
Posts: 655
to your left
BoH_Havoc Offline
User
BoH_Havoc  Offline
User

Joined: Jun 2004
Posts: 655
to your left
Sounds like you are saving it as dxt1. You have to save it as dxt3 - explicit alpha instead.
Using dds for normalmaps might not be a good idea however, as you will most likely get artifacts, even when you turn the compression from color to normalmap. But give it a try, maybe it works for you smile


Shade-C EVO Lite-C Shader Framework
Re: Using DDS for Normal Map and Spec Map [Re: BoH_Havoc] #208432
05/27/08 12:35
05/27/08 12:35
Joined: Feb 2007
Posts: 46
United Kingdom
marcwakefield Offline OP
Newbie
marcwakefield  Offline OP
Newbie

Joined: Feb 2007
Posts: 46
United Kingdom
Hi, Thanks for the quick response.

I will give that a try.

Re: Using DDS for Normal Map and Spec Map [Re: marcwakefield] #208475
05/27/08 16:31
05/27/08 16:31
Joined: Jan 2003
Posts: 4,615
Cambridge
Joey Offline
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Joey  Offline
Expert

Joined: Jan 2003
Posts: 4,615
Cambridge
here is an interesting article which can also be realized easily with 3dgs.

http://developer.nvidia.com/object/real-time-normal-map-dxt-compression.html

Re: Using DDS for Normal Map and Spec Map [Re: Joey] #208957
05/30/08 23:31
05/30/08 23:31
Joined: Jun 2004
Posts: 655
to your left
BoH_Havoc Offline
User
BoH_Havoc  Offline
User

Joined: Jun 2004
Posts: 655
to your left
Interisting find, thanks for this smile


Shade-C EVO Lite-C Shader Framework

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