How to use multiple Clumps in V3?

 
 
 
Posted by:felixxia
Data created:14 October 2020

There is only one video by Marsel about clumping in V3, and it does not address my questions about clumping.

 

1- Can I select a number of Hair Guides, and Clump them? It crashed Maya 2020.2 first time i tried it.  In the video, he selects the hair when "FurballShape1" is active. I dont like it, because selecting process becomes harder. I prefer clumping but hair guide. The second time i tried it, ornatrix wont let me clump it. See screenshot ( EditGuides1 is active while i push Clump button ).

2 - How to have multiple Clumps? Lets say i want to have two clump settings. One clump for the bang, another clump for the rest. How to separate / create new Clump node? Currently it just modify the only clump node, if i tried to create another clump.


Attached Files:

>5.JPG (231835 bytes),

bump! i really need help on this one.

.

Hi,

From the image is not clear what you are trying to do. I don't see any Clump node and Hair from Guides is disabled, hair is needed to generate clumps. 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

okay, forget about the attached pic.

let me just write my problem down here.

I want to use just ONE GuidefromMesh.

And i am not going for animated character, so it is for still image.

For this character, i need to have control over 3 areas of the hair. The bang, the backside and the right side of the hair.

If i put a single Clump Node, then every thing is clumped into one. I need to have 3 separate Clump Node for the bang, the back, and the right hair. I imagine i would also need another sub Clump inside each clump / or nested clump in order to make the hair look more realistic.

I saw a tutorial about nested Clump for V2, but there is not any for v3.

How to tell ornatrix that Clump1 is just for the bang, Clump2 is for the back hair, Clump3 for the right hair, Clump4 is for smaller clumps inside Clump1... and so forth.

To apply a node to a specific area you can use Strand Groups. See docs here

Clumps node works the same on V3 and V2. 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

no, they dont work the same between v2 and v3.
In V2 i can press the clump button and a clump node appears in the hair stack, and i dont have to access Tool Settings.

lets just do this then. You want me to always consult the help pages first, right? Here it goes :

Generating clumps 

Clumps need to be generated manually by selecting a method for generation and clicking the Create Clumps button. Once they are generated they will remain until you either edit them or delete them. The generated clump data will remain stored with the operator.

  • If you use the Create Clumps button without selecting clump hairs or clumps then all hair will be clumped using selected clumping method
  • If you use the Edit Clump Hairs tool to select some hairs and then press the Create Clumps button then only the selected hairs will be clumped

Clumping to guides 

You can create clumps based on the guides which were used to generate the hair. For this you need to have a Hair from Guides operator below Clump operator in the hair stack. If the hair was not created from guides, for example if Hair From Mesh Strips or Baked Hair operators are used, then this method of clump generation will not work.

To clump hairs to guides:

  1. In Attribute Editor set Clump Create Method parameter to Guides
  2. Click Create Clumps button

When the hair guides change shape (for example, when they are animated) the clumps will automatically follow their shape as long as the Clump Create Method is set to Guides.
If the hair guide count or positions change the clumps will not automatically update. You need to click Create Clump(s) again to manually update clumps when guide count changes.

 

 

See, i want to create a clump out of 3 selected hair guides. How do i start doing that?

I pressed the Edit Clump Hair button, and then go to Tool Setting, and Press Create Clump(s) dont do anything. Clump node is not created in the hair stack so that i can do :  "Attribute Editor set Clump Create Method parameter to Guides".

How can i access a Clump Node's Attribute Editor if i cannot create the Clump Node in the first place?

The tutorial by Marsel did not touch this. I dont want to select the resulting hair and create clumps out of them like in the tutorial, because it does not seem to be very accurate. Instead of selecting hair strand, i want to select Hair Guides and make a clump out of it.

 

Advise please. Thank you

 

Hi,

no, they dont work the same between v2 and v3.
In V2 i can press the clump button and a clump node appears in the hair stack, and i dont have to access Tool Settings.

In THIS page about the new changes in the UI you can see that the access to all nodes has been moved to a separate menu, out of the shelf. In this menu you can find and add any Ornatrix node as before. This is to allow easier access to the tools. In this menu you can find and add the Clump node like in V2. Additionally, a Clump node will be automatically added to the stack when you use the Clump Editing tool. This is IF you have a hair shape selected. Otherwise it will show a warning: // Warning: Ornatrix: Please select a node first // 

 

In other words, you can add it manually or the clump editing tool will add it for you. Once the Clump node it's in the stack you can either use the Clump Editing tool or generate the clumps using the options in the Attribute Editor. I hope this is clear now.

See, i want to create a clump out of 3 selected hair guides. How do i start doing that?

If you want to generate a clump from a particular set of guides, you can assign a stand group to those guides and set it in the Strand Group field of the Clump node. Then set the Generation Method to random and Clump Count to 1. This is generate 1 clump out of tree guides as you expect. 

I pressed the Edit Clump Hair button, and then go to Tool Setting, and Press Create Clump(s) dont do anything. Clump node is not created in the hair stack so that i can do :  "Attribute Editor set Clump Create Method parameter to Guides".

The Clump Editing Tool is based on selection: You select a bunch of hair strands, set a Clump Count and the click Generate Clumps. 

If you create custom clumps using this method, then you try to create random clumps or clumps based on guides using the Atrtibute Editor, this will of course destroy your custom clumps. Have that in mind. 

Both procedures of creating clumps are shown here:

 

If you get any error or warning while trying any of this please paste it here. I hope this is useful. 

 

 

 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

See, i want to create a clump out of 3 selected hair guides. How do i start doing that?

If you want to generate a clump from a particular set of guides, you can assign a stand group to those guides and set it in the Strand Group field of the Clump node. Then set the Generation Method to random and Clump Count to 1. This is generate 1 clump out of tree guides as you expect.

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I really dont understand that. Does that mean i have to

1- assign strandgroup to the selected guide

2- select hair strand and follow marsel's instruction video and create a clump node, while keeping in mind that the step i take in here wont have anything to do with the hair guides i want to clump

3- use the resulting clump node from 2, and tell it to just use strand group i created in 1

is this the workflow you have in mind for this?

i followed your instruction but it didnt work.

The clump node, after setting the ( apply by group ) Strand Group to 1 ( 1 is my strand group i want to clump ), the system ignored Strand Group 1 and just clump hair strand i selected in order to create the Clump node in the first place.

 

Advise please! Is this another bug? Or is it because i dont understand your instruction?

bump.

Hi,

Sorry, I missed your last reply. 

To be honest I'm very lost here and I'm not sure if I understand what you need. I will take a step back to see if we can reach a conclusion. 

1- Can I select a number of Hair Guides, and Clump them?

You want to clump the guides, not the hair, right? We don't have an operator but you can use the experimental Clump brush. You can find the clump brush in the User-Defined Brushes roll out in the brush settings when you select the User Brush. 

In your image I see that you are trying to clump guides. This is not possible, at least not in the way that you see in the video because those tools are designed to work on hairs. Do you want to make a feature request? 

2 - How to have multiple Clumps? Lets say i want to have two clump settings. One clump for the bang, another clump for the rest. How to separate / create new Clump node? Currently it just modify the only clump node, if i tried to create another clump.

So, let's say you have a single groom with different areas, and you want to add different clump settings to them. Select the guides of the bangs and add a strand group to them. Select the rest and add a different strand groups to them. Add two Clump nodes, in one of them set the same strand group that you added to the bangs, in the second clump node set the strand group that you added to the rest of the guides. If I understood correctly this will give you exactly what you want. 

Jeordanis Figuereo (Product Designer. EPHERE Inc.)

I just attached a sample scene so you can see how it works. 


Attached Files:

>ClumpingExample.mb (487748 bytes),

Jeordanis Figuereo (Product Designer. EPHERE Inc.)