I'm trying to use bump maps on an object. However, I can't seem to get
much relief on the surface of the object. As I understand it a bump
map takes the whiter areas of the map and makes them high and the
blacker areas of the map are made low. Since my test map is a black
square inside a larger white square this should give the greatest
relief. However, this gives a barely perceptible bump on the surface
of the object. I have tried both .TGA and .GIF maps with the same
result.

Does anyone have any suggestions on how to improve the relief of the
bump effect?

Thanks,

Stefan

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P.S. I tried playing with the bump size. But even setting it to 10000
only provides a slight improvement.

Stefan

On Tue, 11 Jun 2002 16:12:18 -0400, Stefan Sobol <> wrote:

>I'm trying to use bump maps on an object. However, I can't seem to get
>much relief on the surface of the object. As I understand it a bump
>map takes the whiter areas of the map and makes them high and the
>blacker areas of the map are made low. Since my test map is a black
>square inside a larger white square this should give the greatest
>relief. However, this gives a barely perceptible bump on the surface
>of the object. I have tried both .TGA and .GIF maps with the same
>result.
>
>Does anyone have any suggestions on how to improve the relief of the
>bump effect?
>
>Thanks,
>
>Stefan

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nhmcgu00lb5kkgt5mukeneqrpum0l4pn61@4ax.com...
> P.S. I tried playing with the bump size. But even setting it to 10000
> only provides a slight improvement.
> >Does anyone have any suggestions on how to improve the relief of the
> >bump effect?
Hi
I have always felt the same with bump maps. So I tried another way of doing
things, and I think I have the solution.
Sure everybody but you and me know it, but here it is.

I made a plane. In the material's normal statement, I used an image as bump
map (a white square inside a black square).
I added a bump size of 2. I added a transformation to the normal statement
in this way:
Scale <2,2,1> and translate <-1,-1,0> to center the map.
If you render this image the bump is almost invisible.
Why not use another way to get the desired effect?
Sure, in the transformation in the normal statement I changed  scale <2,2,1>
with <2,2,10>.
If you render this image, the bump is evident.

Hope it helps

Txemi Jendrix
tji### [at] euskalnetnet
http://www.geocities.com/txemijendrix

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Hi:
What I said in my previous post is true for planar mapping.
For other map types (spherical, cylindrical, or so) bump size works OK.
I've posted 2 renders in m.b. to show the difference.

Bye


Txemi Jendrix
tji### [at] euskalnetnet
http://www.geocities.com/txemijendrix

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I tried what you suggested, but I could not get any better resutls.
I've posted an image in moray.binaries.

Stefan

On Wed, 12 Jun 2002 02:12:46 +0200, "Txemi Jendrix"
<tji### [at] euskalnetnet> wrote:

>Hi:
>What I said in my previous post is true for planar mapping.
>For other map types (spherical, cylindrical, or so) bump size works OK.
>I've posted 2 renders in m.b. to show the difference.
>
>Bye
>
>
>Txemi Jendrix
>tji### [at] euskalnetnet
>http://www.geocities.com/txemijendrix
>
>

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