Getting Fresnel effect to increase over distance

corrosion

I'm still a newb to some of the more mathy operations in UDK's Mat editor, and even though I'm aware of the camera shader nodes, I am still quite unsure on how to implement them.
What I want to do here is increase the "reach" of the texturized linework around the sphere as the camera moves away. So if you get closer, the linework moves toward the edges, and then as you move far away, the linework reaches farther into the center.

So, here is my setup:


What kind of camera node setup do I need for that?

Also, any suggestions on having the texturized linework part be completely camera facing? so that it doesn't even follow the topology of the model and look almost like an overlay.

thanks.

passerby

try taking a "object world position" node, and a "camera world position" node, and hooking them up to the distance node, which will output the distance as a scaler value, than you will need to divide it by a pretty large number to try and get it near 0 to 1.

Than you can use this to drive a lerp between 2 different Fresnel setups.

corrosion

thank you sir! I will try that!

passerby

something like this for your Fresnel statement maybe.



using worldSpace node instead of object world space could work too, and do it per pixel.

you will have to play with the divider, and the exponets, i just tossed numbers in there.

corrosion

Per your suggestion I went ahead and did this:



To be brutally honest let me just say: I have no idea what I'm doing. :poly136:

corrosion

I'm gonna try your 2nd post suggestion. Thanks for the help, man!

corrosion

Thanks to Passerby I am a lot closer to achieving what I want.





There is another layer of fresnel in this shader somewhere that is a black outline, yet I can't figure out how to make it be "on top" of the "line work" fresnel stuff (I guess because they're hooked up to emissive?) but I know someone out there knows how to set it up so that I can get both the linework fresnel stuff plus a thicker dark outline that will be on top of the lines instead of "under" it. That might be another post though.