Strands Roots not Following after Applying Moov Physics

 
 
 
Posted by:saqib3d
Data created:11 December 2021

hi I m Having Problem with just Specific Strands.after Applying Physics they are not Attatching to the Scalp.its Attatching but looks like the are attached to the Tip of Hair Instead of Root....i also Made two Selection Groups..white Hairs i  want to take Out from Physics actualy i want to keep the Shape always same even in Physics, i also Added the White hairs Group in Attract to Initial Stage Channel but the are moving a bit Rubbery. i just want to add very little natural  Movement.i am attatching Max2020 File and ScreenShots of Problem.


Attached Files:
Image 1
>HaiPRoblem.zip (7489373 bytes),

Hi,

The reason why the roots are not following the scalp if probably because the roots and tips and reversed. This may be the case if you generated the hair/guides from spline curves. To solve this, just make sure that all your spline curves are pointing in the right direction before you convert them to Ornatrix guides/hairs.

also Made two Selection Groups..white Hairs i  want to take Out from Physics actualy i want to keep the Shape always same even in Physics,

To leave some strands out of the simulation you need to use Strand Groups

i also Added the White hairs Group in Attract to Initial Stage Channel but the are moving a bit Rubbery.

What you are using there is a Strand Channel. In a strand channel the colors are multipliers to the amount values, they don't work like masks, so you can't use them for isolation(That is what Strand Groups are for). Black values mean a value of 0, white values a value of 1. In this case you are trying to preserve the initial shape of the white strands and not for the black strands. I just wanted to clarify that. Now you need to play with the Attract to Initial Shape value and the Ramp curve to determine how much of the shape along the strand you want to preserve. 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

Hi Jeordanis

Thanks For your Reply,i create the Spline Guides again,but still there was a Problem,what i did i just Deleted the faces of my Scalp where the Hair Tips Was Attatching to the Scalp .then its Fixed.

yess you are Right i wasnt Using Strands Groups.i was Using Strands Channel.byt the way i used two Groups with Two Differenct OX Moov Modifer,is it the Right Process? somehow its look ok to me,

one more think i need to ask i see the Root Vertex Count is it used for to Stiff the Roots? are these Vertex Count are Following Guides Vertex Counts? for Example if my Guides have 10 Vertex.and i use 10 Root Vertex Count.so its mean my Hairs Gonna be Tottally Static Right? i tried and i reallize this is how its Works..

Thanks For your Reply,i create the Spline Guides again,but still there was a Problem,what i did i just Deleted the faces of my Scalp where the Hair Tips Was Attatching to the Scalp .then its Fixed.

is not necessary to make the spline curves again, you just need to invert them to make sure that the tips and roots are pointing in the right direction, then you can generate the Ornatrix guides from them again.

yess you are Right i wasnt Using Strands Groups.i was Using Strands Channel.byt the way i used two Groups with Two Differenct OX Moov Modifer,is it the Right Process? somehow its look ok to me,

Yes. That is a valid workflow. However, I recommend working with one at a time for performance reasons.

one more think i need to ask i see the Root Vertex Count is it used for to Stiff the Roots? are these Vertex Count are Following Guides Vertex Counts? for Example if my Guides have 10 Vertex.and i use 10 Root Vertex Count.so its mean my Hairs Gonna be Tottally Static Right? i tried and i reallize this is how its Works..

Root Vertex Count is the amount of strand vertices/points that are considered the "Root" in the simulation. If you increase it, the strands will look stiffer because it's "moving" the start vertex of the simulation. I hope that makes sense. So yes, if your guide have 10 points and you increase it to 10, it should keep the whole strand static. I use this parameter with low values to preserve special details in the hair like partings. 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)