Dan Connelly wrote:
> 
> I had no problem seeing features.... but I suggest
> the following changes :
> 
> 1. The map field is defined from y=0 to y=1.  You want
>    y=-1 to y=+1.  Therefore you need to apply a translation
>    and a scale.

oh, I didn't seem to notice that. The bumpmaps are pretty 
ragged, so I didn't notice. Thanks.

> 2. specify a finish.

I found that 
finish {
        	ambient .15
		diffuse .5
		phong .07
	}

works pretty well.

> 3. Your filename is different than the one you posted (jbrp.0.pgm).
>    This may be an issue.

you know, I was so excited to be posting the a newsgroup for the
first time in years I wasn't paying any attention. Sorry :-)

> 4. "interpolate 2" should almost always be used with bump maps
>    to prevent pixellization artifacts.

I didn't seem to notice a lot of difference between interpolate 2
and interpolate 4, but I did notice the difference between 0 an {2,4}.

> 
> Consider the following scene :

hrm...lemme quickly render and see...

wow, I commented out the translation line and I quickly
see what you mean about the map location! I didn't notice it
in mine because I rotated them about 45deg. 

Now why did I put a "phong" shading in mine when I 
should have been using "specular"...Hrm. It sharpens it quite
a bit. I like the effect when roughness in increased as well.


> http://www.flash.net/~djconnel/

-- 
# Jed Reynolds, mailto:jed### [at] surfsoftcom http://www.surfsoft.com/~jed
# "...I've seen the old geeks talk to the young geeks, and they speak
# the same language. There's no age gap or anything." --Steve Wozniak

Post a reply to this message