Hi folks,

A view days ago I posted my Diablo image on p.b.i and some of you said, that
the ground looks to flat. Indeed, the structure is not very well done. I
used an image with desaturated colors and increased contrast to make the
bump map. This is the code:

polygon {
    4,
    <0, 0>, <0, 30>, <30, 30>, <30, 0>

    pigment {
                image_map {jpeg "ground.jpg"}
                scale 12.0
                translate <2, 0, 0>
    }
    normal {
                bump_map {jpeg "ground-bump.jpg"}
                scale 12.0
                translate <2, 0, 0>
                bump_size 5.0
    }
    translate <-18, -10, 1.53>
}

But the bump effect is nearly unvisible. Something wrong with it?

Thanks & Regards,
Andreas

-- 
http://www.render-zone.com

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3f02013b@news.povray.org...
> But the bump effect is nearly unvisible. Something wrong with it?

- Is it radiosity-only lighting? If that's the case, don't forget to add
"normal on" to the radiosity statement.
- be sure to have the whole black->white range in your bump map. Narrow
ranges don't give good bumps.
- replace the pigment map by a simple color (such as white or cyan) so you
can see the effect better during the tests ; then add a finish such as
finish{diffuse 1 ambient 0 specular 1 roughness 1/20} and start from here
- increase the lighting
- change the light position (shallow angles work better)

G.


--
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