mentalray arch&design materials physically correct

[SgWRX]

hello. haven't posted in a quite a long time. if something is 100% reflect, in the reflectivity spinner - 1.0, ah ha!

 

my question was - if something is 100% reflective, how could it possibly have a diffuse color?

 

the answer is the BRDF custom curve. darn - i forget that a lot more than i like to.

 

ok, so the next question is how reflective are every days materials used in construction. for example clear aluminum door or window frames/mullions? how reflective is car paint?

 

i know there's a gloss factor (not sure if the actual real-world measured factor can relate to arch&design materials?) but is there also a standard real-world measurement for reflectivity that can relate to an arch&design material?

 

thanks,

[Justin Hunt]

There has been quite alot of research in real world reflectivity and such, pretty sure if you google it you will find a table of IOR values for most things.

 

In the A&D use the IOR value rather than the BRDF curve to assign these values.

 

jhv

[SgWRX]

oh, i didn't realize IOR was best for this. thanks.