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Old 22nd February 2007, 12:08 AM   #1
omarsr
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Default Do 2 sided materials exist in AC3D5?

In 3Dmax, you can assign a 2 sided material to a one sided mesh. This allows a one sided mesh to appear to be two sided. Can AC3D5 do this also? It would really help if a two sided material exists in AC3D5. If it does, where can I get it?
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Old 22nd February 2007, 11:33 AM   #2
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Default Re: Do 2 sided materials exist in AC3D5?

I'm not aware of 2 sided materials in AC3D, I just make the surface 2-sided (not sure what this does to the poly count)

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Old 22nd February 2007, 04:28 PM   #3
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Default Re: Do 2 sided materials exist in AC3D5?

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(not sure what this does to the poly count)Art
It does nothing .
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Old 22nd February 2007, 06:17 PM   #4
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Default Re: Do 2 sided materials exist in AC3D5?

Good to know - thanks

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Old 25th February 2007, 08:55 PM   #5
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Default Re: Do 2 sided materials exist in AC3D5?

I always thought that if a one sided mesh had 4 polys, then making the mesh two sided would double the polys to 8. Is this not right?
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Old 26th February 2007, 02:09 AM   #6
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Default Re: Do 2 sided materials exist in AC3D5?

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Originally Posted by omarsr View Post
I always thought that if a one sided mesh had 4 polys, then making the mesh two sided would double the polys to 8. Is this not right?
The number of polys drawn in most 3D engines is doubled for 2-sided objects, as you describe. However, the actual stored geometry is not doubled.

So a 2-sided triangle is still stored to disk (and in memory) as 3 vertices and a single surface, but at run-time (within a 3D application), there are 2 surfaces drawn.

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Old 26th February 2007, 09:50 PM   #7
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Default Re: Do 2 sided materials exist in AC3D5?

So end use is a deciding factor. If I am creating for a video game, I still need to take care with which meshes are one sided, and which are two sided as rendering needs to be taken into consideration. Right?
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Old 27th February 2007, 05:37 PM   #8
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Default Re: Do 2 sided materials exist in AC3D5?

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So end use is a deciding factor. If I am creating for a video game, I still need to take care with which meshes are one sided, and which are two sided as rendering needs to be taken into consideration. Right?
Correct
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