Index of Refraction Value for Wet Rock (Was Index of Refelction)

[Cyber-Angel]

Dose any one know the real world Index of Refraction Value for wet rock as it would be useful to know so I can finish this WIP I'm working on a present?

Regards to you.

Cyber-Angel 

[sjefen]

I don't know, but since it is water that causes it to look wet I would guess 1.33

[Tangled-Universe]

Maybe here

http://forum.cinema4d.be/vb/showthread.php?t=1274

Martin

[cyphyr]

There is no such thing as a reflective index. Reflective surfaces may or may not refract depending on if they are transparent or not. However the water which is on the rock will have a small refractive component which will be about 1.33 with a slight variation depending on if there is salt etc dissolved in it and its temperature but these are so small as to have little visible effect.
Richard

[Virex]

Dose any one know the real world Index of Reflection Value for wet rock as it would be useful to know so I can finish this WIP I'm working on a present?

Regards to you.

Cyber-Angel 

Index of reflection? You mean the percentage of light that's being reflected? I don't have a clue, but a wild guess would be around 40%.

[Cyber-Angel]

Sorry Guy's Typo on my part, that should be "Index of Refraction" sorry for the confusion? 

Regards to you.

Cyber-Angel

[krecacy]

Hi, there's no such thinkg like index of refraction for a wet rock - since it has to be refractive - that means at least a bit transparent. Since the rock is fully opaque u dont need an index of refraction (at least not a specific one - u might use 1.333 if you have to). What you are after is a nice reflection, not refraction. I am not an advanced TG user, but u might take advantage of fresnel reflection - which is true for almost all things around us.

Cheers

[Christopher]

A wet rock is both reflective and refractive. Just about everything in nature has an index of refraction to some extent.

Say the rock is mostly made up of Iron which has an index of 1.51. There is a slight transparency there even though it's on a micro scale. Steel has an index of 2.5 for example. Fresnel is very helpful.