hiya,
iam back in the vex exploring business and i am tryin to achieve
an electron microscope shader look..
i am really stuck in the begining trying to achieve the diffuse color
to get white when the incidence angle is 0 (at the boudnaries of the geometry)
and black when the angle is 90…

kind of like the edge fallof but inverted…
i tried to disect the edge fallof but had no luck… any ideas to get me started?


cheers J.

kind of like this one .. but a bit less diffuse on the 90 angles..
more black there..

http://pixel-samurai.blogspot.com/ [pixel-samurai.blogspot.com]

A very simple shader is something along the lines of:
Cf = 1 - abs(dot(normalize(N), normalize(I)))
(from Ivan DeWolf's post a long time back)

that was quick


thanks i ll chjeck it right away
cheers
J

check here
http://forums.odforce.net/index.php?showtopic=3770&hl=xray%20shader&st=0 [forums.odforce.net]
xray and microscope are quite similar?
hope this helps
there is some old pdf somewhere If i remember i will post it
z

thanx! it works exactly as imagined…

I originaly used N not Ng for the normal it still produces the same result tho..
what is their difference ?..cant find any info anywhere….

J.

Ok this is from Steve Upstill Renderman Companion…

“The shading normal vector N is by default equal to Ng but maybe different for shading purposes.If a displacement shader changes the surface normal it usually works on N and leaves Ng alone”

I wonder if the same thing happens with bump