Dynamics III – 2.3 Values on the Net

While chapter Real World will discuss the parameter values that represent various clothing materials in life, I can imagine that you’d like an overview to get a head start.

The origin of most values was in www.poserfashion.net (before it got hacked, you can find the Original in Internet’s WayBackMachine), a website on 3D clothing that started even before Poser introduced the Cloth Room (see chapter Cloth sim in perspective on history, part IV). PhilC and SvdL extended the list, while also presenting a mechanism to create preset collections. Either through assigning mat’s (PhilC, free on his site www.philc.net) of though a scripted user interface (SvdL http://www.renderosity.com/mod/freestuff/details.php?item_id=38542).

In all cases marked (*), SvdL deviated from the poserfashion values, and added cloth types and a parameter. In all cases marked (**) PhilC deviated from SvdL. In all unmarked cases, they agreed. The Poser Default is added for reference.

.. Default Burlap Cotton Leather Rubber Silk Wool Denim* Gossamer* Heavy leather* Latex* Velvet
Fold res 5 150 15 50 20
40*,20**
2,5 40 15 / 20** 1 800
800/5**
600/50 215
Shear res 50 500 225 200 35 50 150 240 1 800 200 100
Stretch res 50 250 75 200 10 50 100 75 1 800
800/50**
1
1000**/1
50
Stretch damp 0.1 0.1 0.1
0.0*,0.1**
0.1
0.01*
0.1 0.1 0.1 0.1 0.1
0.01**
0.01 0.8 0.1
Cloth dens 0.005 0.01
0.009*
0.01
0.005*
0.05
0.005*
0.075
0.02*
0.005 0.01
0.005*
0.005 0.02 0.02 0.4 0.03
Cloth self fric 0 0.4 0 0.4 0.7 0.2 1.0 0.0 0.2 0.75 0.4 0.02
Static fric 0.5 0.6 0.5 0.5 0.6 0.3 0.8 0.5 0.3 0.5 0.5 0.6
Dyn fric 0.1 0.4
0.1*
0.1 0.3 0.3 0.1 0.6 0.1 0.1 0.3 0.3 0.2
Air damping 0.02 0.01 0.02 0.01
0.02*,0.01**
0.005 0.04 0.02 0.02 0.75 0.02 0.75 0.02
Scale*   100 50 50 50 100 100 50 100 100 100 50

Note that the Scale parameter is not supported by the Cloth Room dials, and that PhilC/SvdL sometimes discriminate between values in U and V direction (like Latex Fold Res = 600/50), which is not supported by the Cloth Room dials either.

On top of that, I’d like to note that some parameters are very hard to obtain for real life clothing (how do you measure the amount of folding and the fold resistance?) and that some parameters or combinations seem quite unrealistic to me (how can Gossamer and Heavy Leather have the same density while Gossamer has a 40-fold air damping?). Why does Gossamer has a Stretch Damping of 0.1 according to SvdL and 0.01 according to PhilC while they agree on all other parameters? Why are the Posernet values taken for granted while they were published before Cloth Room came to life? Why do all the density values deviate so much from my simple measurements (chapter Real World)?

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