Is there a thing like index of glossines? Something like a general guideline how glossy certain materials should be. Can this even be measured somehow in real life?
i dont think it can be measured unfortunately. infinite number of variations im afraid.
it can be measured for one specific material. Not translating to faked speculars or glossiness tho. Called BRDF measurement and it measures a whole lot more then just glossies. But it’s still pretty damn expensive and not exactly “comfortable” to use. Plus it removes quite some control.
Thorsten
well the problem is the specific material. say its a piece of varnished wood. the variations possible in just the varnish, would just make it difficult to get a baseline.
As Percydaman said it is almost imposible to compile usefull results because there is so many variables involved.
I had once one of these tables and found it useless: values have ranges so wide that it renders it unusable.
For example:
Limestone: 35-55%
Polished aluminium: 65-75%
Oak polished: 20-35%
Polished marble: 30-70%
Instead I use a “guess what looks good” aproach
Zoran
I heard about those BRDF measurments. A friend of mine uses Inspirerer with this information to produce very accurate lighting analysis.
Although, i still wonder, why couldn’t a simple test be made, just by measuring a diameter of a highlight on a sphere made out of certain materials?
because maybe it’s not linear the way the specular changes given light angle and light size.
A guess, hey…
I hear even with IoRs there are issues (in maxwell) in that oftetimes complex, measured IoRs don’t work as the user expects.
But it’s stuff i gathered from their forums, not personal tests…
Lele