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Why does normal mapping increase the MDL size so dramatically

G

gary20

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56
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canada
Why does normal mapping increase the MDL size so dramatically?

When I compile my model normally without normal maps (T_Bump maps) the finished MDL is about 2mb.
BUT ... if I add normal mapping, the T_Bump maps, the finished MDL is almost 15mb !!!

There's no increase in frame rates and they seem to display correctly, but why the dramatic increase in the size of the MDL?

Is that usual?

Gary
 
Hi Gary,

I would not expect such a big increase. The only difference should be that your material references another texture. So I would only expect a few kB difference.
 
Thanks Arno

I think I'm doing it right and I follow the SDK method using Imagetool for the final conversion. I end up with regular normal maps that I add through the usual way.

I'm Windows 7 64 bit .... I wonder if thats got anything to do with it, but it certainly is a curios phenomenon.
Like you I would expect a modest increase, so I'm stumpped as to the why.

Gary
 
If memory seves me well (not too likely) each bumped material adds another odd MB of mdl size so if you have a lot of these the mdl size can go up. I would think that's normal.
 
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