transparency in VEX surface shader

[aracid]

hey all

im basically trying to create a shader that the opacity is based on the surface normal, just like water. simple eh

in houdini theres a vex_super material that does the exact thing i want, with the alpha para and perp. etc

an example of this for those who are also using maya, it's just the sampler info node that does this.

but im tryin to do this with my own shader

so if anyone could just tell me how they do that, it would be great.

btw, ive really tried, but my results are

all the best

aracid

[edward]

Try looking at the code for the VEX Super Material SHOP. Right-click on it in the network editor and choose Type Properties. Then go to the VEX Code tab.

[renderfox]

Basicly this done using dot product of N and -I. Both vectors must be normalized. To control falloff use pow function.

So classic RMC glow shader looks like:

opacity=pow(clamp(normalize(N).normalize(-I), 0, 1), falloff);

clamp used for drop off backfaces

[aracid]

hey there edward and renderfox

thats exactly what i was looking for,

and thanks for the vex code tip aswell.

all the best

aracid