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Truevision3D >> Game Development >> Game Development (Moderators: Waterman, Mithrandir_, beyonder, ZaPPZion) >> Alpha-Maps? What is one?? (NEWBIE QUESTION, incase you didnt notice)
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Author Topic: Alpha-Maps? What is one?? (NEWBIE QUESTION, incase you didnt notice)  (Read 1710 times)
piepieonline
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« on: April 17, 2009, 12:29:31 AM »
I have been looking around but I cant seem to find a description of exactly what an alpha map is...
While on this subject, what's a normal map?
Can anybody help?
Thanks.
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ZaPPZion
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« Reply #1 on: April 17, 2009, 02:49:04 AM »
alpha map = transparency map

normal maps is easy:
http://lmgtfy.com/?q=normal%20map
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beyonder
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« Reply #2 on: April 17, 2009, 09:53:59 AM »
Alpha maps are very useful.

Take a palm tree.

Base Texture:

Alpha Texture:

Rendered Output:


The alpha makes the black around the base texture transparent. So its not seen.

Alpha=Opacity

The alpha map is always greyscale (black and white).   Wink
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"And what I saw scared me to the depths of my miserable soul. It was true, it was all a sham, it ain't real." - The Thirteenth Floor
piepieonline
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« Reply #3 on: April 17, 2009, 05:45:28 PM »
Ok thanks guys.
Another question, how do I work this for Texture Splatting?
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ZaPPZion
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« Reply #4 on: April 18, 2009, 04:27:39 AM »
samples #12

http://www.bartkuipers.com/index.php?id=59
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