Index Of Refraction

[kingsoz]

helloooo,

I'm trying to make a water material from scratch using Peter Draper's deconstructing the elements book, but using houdini, however i don't know where to connect the 'Refract' vop.

any suggestions would be greatly appreciated

taaaaa

[kingsoz]

this is a reply to my own question, when i mean refract i mean index of refraction, but the closest operator i found in VEX was the refract vop.

hope this makes things clearer

[edward]

In the Refract VOP's parameters, there's "Index of Refraction". I think that maps to the "eta" input. I forget now whether you need to do divide your index from 1 first though. Note there's also the Fresnel VOP.

[kingsoz]

hmmm i still don't get it, sorry!

is it ok if somebody creates a quick VEX Surface Shader for me, just indicating how and where i connect the Index of Refraction into the nodes so i can have access to it in SHOP's?

cheers

[symek]

Go into your VOP network:

TAB -> create Fresnel VOP

MMB on eta input and "Create Paramiter"

Name it somahow or leave as it is

Now, if you create shop from that VOP you alread see your eta on shader tab.

Of course this has nothing to do with specific fresnel usage, I don't know what you would lik eto achieve.

If you, for example, multiply "kr" - one of fresnel output with reflective VOP output, you scale your reflections with material reflective ange, (does it name fresnel reflections?)

cheers.

SY

example included thought I'm not a master in this game

fresnel_reflective.hipnc

[kingsoz]

brilliant!!

thanks thats great! once i've finished what i'm doin i'll post bits and pieces onto to WIP section to show ya

thanks again!