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1Tutorials Maya How to make realistic trees with SHAG: FUR Empty Tutorials Maya How to make realistic trees with SHAG: FUR em Sab Jan 22, 2011 1:00 am

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Step 1: the making of the trunk and the crown of the tree
Let's start with the trunk of the tree. This is not a tutorial about mesh modeling that's why I am not going to explain it in details.
The Trunk
Make a cylinder. Then convert it to editable mesh, and with the help of extrude, bevel and moving the vertices try to make the model look like fig.1
Tutorials Maya How to make realistic trees with SHAG: FUR Image001

The Crown
There are two ways to make the crown:
The first way is to make your own model but it takes longer.
Here I am going to explain the easiest way. In my case I used the free script treemaker by Shawn Lewis [Você precisa estar registrado e conectado para ver este link.]. I created a tree with the default parameters. From the script's menu I converted it to editable mesh. On polygon level I selected the branch/es/ and detached it as clone giving it a name for example "branch_1"; (fig. 2, fig. 2a)
Tutorials Maya How to make realistic trees with SHAG: FUR Image002

Tutorials Maya How to make realistic trees with SHAG: FUR Image003

Then you delete the mesh saving only the clone (branch_1), and using rotate and clone operations arrange the crown of the tree (similar to fig. 3).
Tutorials Maya How to make realistic trees with SHAG: FUR Image004

Step 2: The fur part
Attach all of the branches in one object. Go to polygon level and make a random or exactly chosen selections - it depends of what you want to achieve. In my case I selected only the ends of different branches. Give material ID number to the selection/s/. If you are going to place more than one fur on the object use different selections with different ID's.
A similar result is shown at fig. 4
Tutorials Maya How to make realistic trees with SHAG: FUR Image005

Then close the Edit Mesh menu and go to the Environment panel. Press the Add button and select Shag:Render and Shag:Fur (fig. 5, fig. 5.1)
Tutorials Maya How to make realistic trees with SHAG: FUR Image006Tutorials Maya How to make realistic trees with SHAG: FUR Image007

In the Shag:Render field uncheck Geometry Larger Than. When checked, this option will alarm when the geometry is over 50000 faces (by default). You can increase or decrease the number of faces, but I prefer to turn it off. (fig. 6)
Tutorials Maya How to make realistic trees with SHAG: FUR Image008

Then you go to the Shag:Fur field, click on the Pick button and then in one of the viewports select the crown. After that you will see the whole object covered with fur. Press the Face Level button and tell the fur where to be placed. (fig. 7, fig. 7.1)
Tutorials Maya How to make realistic trees with SHAG: FUR Image009Tutorials Maya How to make realistic trees with SHAG: FUR Image010

There you choose Sub-Material ID and type 2 in the field. If there is only one selection you can select Current Face Selection, but in more complex objects it is better for you to choose between Named Selection, Sub ID or Multiple Sub IDs. In the viewports now you can see that the fur is in the right place.
Then you go down in the fur menu where the parameters for Length, Thickness and Density are. For length type 50.00, for thickness type 2.0 and check the box named Flat in the Section field. For density type 0.1 (fig 8.0)
Tutorials Maya How to make realistic trees with SHAG: FUR Image011

If you want to create a more chaotic look of the crown use the Orientation and Random options (fig 8.1)
Tutorials Maya How to make realistic trees with SHAG: FUR Image012

If you want to simulate gravitation use the Shag Vector. Select it from the Helpers menu. Place the vector and type for Far Range 0 and for Far Amount 1.0. This makes the range of the vector unlimited. (fig 8.2)
Tutorials Maya How to make realistic trees with SHAG: FUR Image013

Then you go to the fur menu in the Leaning and Bending fields. In the Leaning section press the Select button and choose the vector. Then play with Amount, Max Angle and Random Factor. (fig 8.3)
Tutorials Maya How to make realistic trees with SHAG: FUR Image014

Go up in the field Geometry. Check Enable, make it 2 side and type for Knots - 3 and Bezier steps - 2. (fig. 8.4)
Tutorials Maya How to make realistic trees with SHAG: FUR Image015

If you made it right through here you will see something like fig. 8.5
Tutorials Maya How to make realistic trees with SHAG: FUR Image016

Select the Fur object in the viewport and with right mouse click convert it to an Editable Mesh and give it a name "subbranches"; for example (fig 8.6)
Tutorials Maya How to make realistic trees with SHAG: FUR Image017

Then you go back to the Environment menu and add a new fur. Press the Pick button and select the "subbranches"; object. You will see a result similar to fig 8.7.
Tutorials Maya How to make realistic trees with SHAG: FUR Image018

Now hide the "subbranches"; - you don't need it anymore. Name the new fur object "leaves"; for example. Now you need to repeat the whole operation that you made for the "subbranches"; figures (8.0, 8.1, 8.3 and 8.4).
Use the following parameters:
Length: 12.00
Thickness: 70.00
Next to the thickness parameters you have a button /fig 8a/. Left click to enable it, with right click you open a panel where you can edit the curve / fig 8b/.
Tutorials Maya How to make realistic trees with SHAG: FUR Image019

Tutorials Maya How to make realistic trees with SHAG: FUR Image020

Make the section flat again.
And for Density type 0.01.
Feel free to play with Random and Orientation parameters (fig. 8c)
Tutorials Maya How to make realistic trees with SHAG: FUR Image021

A good feature of the plugin is:
When you select a fur geometry in Max's Modify panel, a menu appears in which you can convert the geometry in mesh (but that does not collapse it). With this feature you can see the deformation of the fur object in real time (see the figure below).
Tutorials Maya How to make realistic trees with SHAG: FUR Image022

Check Enable geometry, make it 2 sided and type minimum parameters in Strand Detail (fig. 8d)
Tutorials Maya How to make realistic trees with SHAG: FUR Image023


Then you can convert the geometry to an Editable Mesh but this will slow down the work on the scene. If you want to animate the tree don't convert it. The result of this is shown on fig. 8.8
Tutorials Maya How to make realistic trees with SHAG: FUR Image024

Step 3: The color part
In Material editor make a standard material. For Diffuse use a map of leaf and for Opacity use the same map but in grayscale (fig. 8.9)
Tutorials Maya How to make realistic trees with SHAG: FUR Image025

Then assign the material on the fur object and make a test render (fig. 8.9.1)
Tutorials Maya How to make realistic trees with SHAG: FUR Image026

The tree is almost ready. Repeat the operation in other parts of the crown. It's better to use different parameters for the leaves to create various results.
Here is a sample part of the scene branch with leaves and textures - Shag: Fur required
Trees_With_Shag_Fur_Sample_Scene.zip (368 KB)
And the final result
Tutorials Maya How to make realistic trees with SHAG: FUR Image027
Download [368 KB]

This is for now, more tutorials how to make different kind of trees or plants coming soon
THE END
Talk about this tutorial at the Forum >>
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Copyright � Dimitar Tzvetanov
Source: [Você precisa estar registrado e conectado para ver este link.]]

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