Glossiness settings for command materials

[re:FORM]

Does anyone have a list of typical glossiness settings for common materials...

ie
Plaster
Painted plaster
stucco
brick
concrete
ceramic tile (matt... not glazed)
etc

I'm sure I've seen something on this before, but I couldn't for the life of me find it again!

I've been using low glossies on all my materials, to good effect, but it would be nice to know the values i am using are closer to being scientifically correct.

Cheers

[Buck]

I have seen charts for refractive IOR, but never for glossyness. Would be interesting to see

[flipside]

Since the glossiness value is nowhere near a physical property, I doubt there are charts for it. Blurred reflections/refractions are a fake for surface roughness, maybe try finding a chart for that (it won't be in a scale of 0 to 1 though...)

You can't say how blurry the reflcetions should be on for example plastic, it all depends on how it is manufactured, with tiny textures or not etc...

[Tog]

For concrete, brick... highlight glossiness would be better than glossy reflection. Render a room with concrete walls using glossy reflection use a lot a time and you are not sure to obtain a good result. Moreover,You need a lot of subdivision for glossy reflections

This is my point of view

[jow]

what about things like wood,should fresnel be ticked.i understand that wood with a high gloss vanish wouldnt be ticked but what about things like laminates,flooring and furniture?....

[percydaman]

I always check fresnel. If I want it alot more reflective, I up the IOR value.

[R2J2]

here are some reflectance values (can't remember where I got them) and I allways fiddle with them.

Stucco 15 - 40 %
brick 10 - 15%
concrete 20 - 30%

[jow]

is that all refective mats percy or just wood?.

[percydaman]

ya i usually use it for ALL reflective mats. even chrome.

[Ruairi]

>>>>>Render a room with concrete walls using glossy reflection use a lot a time and you are not sure to obtain a good result. Moreover,You need a lot of subdivision for glossy reflections>>>>


not if you are using adaptive QMC

[jow]

mmm, interesting so at what IOR value is it not a fresnel reflection,- 10,30,50?is it affective at these high values?

[percydaman]

hmmm...i think its still technically fresnel reflections. If Im not mistaken, most all objects have fresnel reflections of one sort or another. Maybe not pure reflective chrome.

[jow]

thanks for the info percy,ill have a mess around with it over the weekend.
cheers.