procreate - brush

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Với người mới học digital painting thì họ sẽ có cảm giác như lạc vào một mê cung và brush là một trong các mê cung đó. Muốn vẽ một bức tranh tất nhiên là phải biết cách dùng cọ, mà để dùng được cọ thì trước tiên phải hiểu được nó

Stroke path - đường cọ

space - khoảng cách giữa 2 đầu cọ khi quét thành vệt
streamline (= smoothing) - tạo nét cọ mượt
Jitter - Biến thiên về vị trí
Fall off - nét cọ mờ dần

Taper - nét vuốt

Pressure Taper - Lực nhấn Apple Pencil
- Pressure Taper Slider
  - Link Tip Sizes - Điều chỉnh 2 đầu cọ thon dần cùng 1 lượt
- Size - độ thon từ nét cọ lớn đến nét cọ mỏng
- Opacity - độ mờ dần khi nét cọ thon dần
- Pressure - Lực nhấn để tạo nét thon dần
- Tip - càng giảm đầu nét thon càng nhỏ như sử dụng cọ nét mảnh
  - Tip Animation - thêm nét vuốt phụ
Touch Taper - Lực nhấn ngón tay
- Touch Taper Slider
  - Link Tip Sizes
- Size
- Opacity
- Tip
Taper Properties
- Classic Taper

Shape - hình dạng đầu cọ

Shape Source -
- Edit > Shape Editor
  - Import (photo, file, Source Library)
Shape Behavior
- Scatter (biến thiên về góc xoay)
- Rotation - góc xoay shape, tăng tối đa sẽ kích hoạt Follow stroke
- Count - số shape ở mỗi vị trí (khi kế hợp với Scatter)
- Count Jitter
- Randomized - tạo góc xoay ngẫu nhiên
- Azimuth
- Flip X / Flip Y
- Brush Roundness Graph
- Pressure Roundness
- Tilt Roundness
Shape Filtering
- No Filtering
- Classic Filtering
- Improved Filtering

Grain - texture chất liệu

Grain Source
- Edit > Grain Editor
  - Import (photo, file, Source Library)
Grain Behavior (Moving - Texturized)
- Movement
- Scale
- Zoom
- Rotation
- Depth
- Depth Minimum
- Depth Jitter
- Offset Jitter
- Blend Mode
- Brightness / Contrast
Grain Filtering
- No Filtering
- Classic Filtering
- Improved Filtering

Rendering

Rendering Mode
- Light Glaze
- Uniformed Glaze
- Intense Glaze
- Heavy Glaze
- Uniform Blending
- Intense Blending
Blending
- Flow
- Wet Edges
- Burnt Edges
- Burnt Edges Mode
- Blend Mode - chế độ hòa trộn theo đường cọ
- Luminance Blending

Wet Mix

Dilution
Charge
Attack
Pull
Grade
Blur
Blur Jitter
Wetness Jitter

Color Dynamics

Stamp Color Jitter
- Hue
- Saturation
- Lightness
- Darkness
- Secondary Color
Stroke Color Jitter
- Hue
- Saturation
- Lightness
- Darkness
- Secondary Color
Color Pressure
- Hue
- Saturation
- Brightness
- Secondary Color
Color Tilt
- Hue
- Saturation
- Lightness
- Secondary Color

Dynamics

Speed
- Size
- Opacity
Jitter
- Size
- Opacity

Apple Pencil

Pressure
- Size
- Opacity
- Flow
- Bleed
- Smoothing
Tilt
- Opacity
- Gradation
- Bleed
- Size
  - Size Compression

Properties

Brush Properties (Use Stamp Preview - Orient to Screen)
- Preview
- Smudge
Brush Behavior
- Maximum / Minimum Size
- Maximum / Minimum Opacity

Blend mode của Brush

Trong Brush Studio > Rendering > Blending

STROKE

Nét cọ vẽ trên màn hình là do nhiều điểm (points) nối tiếp nhau

Stroke Plot

Spacing (khoảng cách): là khoảng cách giữa 2 điểm. Tăng Space nét cọ càng đứt khúc. (dash)
Jitter: Jitter refers to the amount of distance by which your shape will be offset from the stroke plot. Smaller values will look more like a solid line, while higher values will spread the shape out and hide the visible line you draw

Stroke taper (nét vuốt, đuôi nét)

Start stroke taper: nét cọ bắt đầu từ nhỏ lớn dần. Tăng giá trị này đoạn khởi đầu càng dài
End stroke taper: nét cọ kết thúc nhỏ dần, tạo hiệu ứng vuốt cọ. Tăng giá trị này nét vuốt càng dài
Opacity stroke taper: độ mờ khoảng nét vuốt. Giá trị này càng tăng, khoảng vuốt cọ càng mờ
Size stroke taper: điều chỉnh kích thước nét vuốt nhỏ dần.

SHAPE

Shape là hình dạng của điểm. Sự phân bố của điểm tạo ra đường (Stroke).

Shape là mảng, phần bên trong của mảng là grain các điểm này

Shape như 1 lần đóng dấu, và các dấu liên tiếp tạo nên A shape is just like a stamp. The image you select as the Shape will be repeatedly 'stamped' over the course of a stroke. You could also think of the Shape as a container for the grain.

Shape

Scatter: Changing scatter will change the orientation of your brush as your stroke progresses. Higher values will give a messy, rough feeling while low values will be like a streaky brush. Scatter is not affected by brush direction.
Rotation: The rotation slider affects how your brush reacts to directional change. A range of unique effects can be achieved from a flat calligraphy brush to ribbon effects. The rotation slider has three main points:

‘100% Inverse’ makes the shape rotate inversely to stroke direction.

'Static' locks shape direction to remain static.

'Follow stroke' causes the shape to follow your painting direction.

Randomized: When OFF—Initial shape direction is based on the stroke’s beginning. When ON—direction is different for the beginning of every stroke. This can give each stroke a unique behaviour and a more organic feel.
Azimuth: Azimuth is used for brushes where the direction of the brush shape on the canvas should be the same as the direction of the Apple Pencil, just like a calligraphy pen nib.

Turning Azimuth ON will make the shape follow the perpendicular angle of Apple Pencil.

Grain

As you’ve already learned, Procreate brushes are created using dual images. While the shape acts as a container for the grain, the grain itself acts like a paint roller. When you paint a stroke, the grain is ‘rolled’ inside the shape and on to the canvas.

Movement: When set to 'Stamp' the grain texture will not roll at all. Instead it will smear the grain. When set to 'Rolling' the grain will apply its texture just like a repeating paint roller.
Scale: Grain scale adjusts the size of the grain texture inside the shape
Zoom: When set to 'Follow size' the grain will scale with your brush shape. When set to 'Cropped' the grain is locked and the brush shape will scale independently, from the grain. A great way to understand how zoom works is to use the precision slider preview.
Rotation: Grain rotation is very similar to Grain movement. This setting will smear and slur the grain image–based on directional stroke changes. The rotation slider has three main points along the slider:

‘100% Inverse’ makes the grain rotate inversely to stroke direction.
'Static' locks grain direction to remain static.
'Follow stroke' causes the grain to follow your stroke direction.

Filtered: ON applies Antialiasing to your grain texture. OFF can cause the grain to become jagged and coarse.

DYNAMICS

These settings are applied on-the-fly when you draw and paint. Dynamic settings allow you to create incredibly unique brushes.

color mix:

Falloff: Affects the overall length of the stroke. All effects will be applied within this setting.
Dilution (Độ pha loãng): Dilution is directly related to the Paint characteristic. Varying values of dilution will create different levels of ‘water’ in your paint. When a high amount of dilution is applied to your brush, the brush will mix and pull more paint as you drag it around.
Charge: Charge refers to the amount of virtual paint applied to a brush. For instance, when set to ’0′ the virtual paint will ‘run out’ almost instantly. The Charge setting is great for traditional artists!
Glazed: When ON, your brush will paint in a uniform transparent manner and will no longer 'build up' over time. Because of this, the Glaze effect behaves exactly the same as default Photoshop® brushes.
Accumulative: This option only works when Glaze is active. When ON the shape will ’build up’ as the stroke is made.
Flow: This option only works when Glaze is active. Flow will determine the amount of paint applied to an area every time the brush moves.

Opacity Variance

Opacity Speed: Opacity will vary depending on the speed of your stroke.

Opacity Jitter: The stroke will vary in opacity as it is stamped across the canvas.

Size Variance

Size Speed: Size will vary depending on the speed of your stroke.

Size Jitter: The stroke will vary in size as it is stamped across the canvas.

PENCIL

Tailor Apple Pencil exactly to your needs. If you are using a supported 3rd party stylus, pressure and size will also adjust your stylus. Tilt is only available with Apple Pencil.

Pressure Opacity: When set to 0% the brush will not react to pressure changes. When set to Max, more pressure will make the stroke opacity stronger. When set to 100% inverse, more pressure will make the stroke transparency increase.

Pressure Size: When set to 0% the brush will not react to pressure changes. When set to Max, more pressure will make the stroke size bigger. When set to 100% inverse, more pressure will make the stroke size smaller.

Pressure Softening: When set to 0%, any changes in pressure will be immediately acted upon. Larger values will smooth out the pressure response, which is excellent for getting gradual changes with glazed brushes. Lower values give brushes a quicker response to changes in pressure.

Tilt Opacity: When size is set to None the brush will not react to Apple Pencil tilt changes. When set to Max tilting Apple Pencil will aggressively make the brush size bigger.

Tilt Size: When opacity is set to None the brush will not react to Apple Pencil tilt changes. When set to Max tilting Apple Pencil will aggressively make the brush fade off vertically.

GENERAL

Here you will find general brush characteristics which apply to the brush overall.

Properties

Orient to iPad Screen: When ON, oriented will cause the brush to orientate itself according to the iPad screen orientation

Use stamp preview: When ON, stamp view will cause your brush preview to display only the brush shape file. Stamp view can be very useful when the grain is not a significant part of the brush.

Size limits

Max size: Maximum size is responsible for determining the maximum radius that the brush can reach. By default, all brushes can reach 100% radius. However, if a brush has a spacing value greater than 12%, the brush can reach an incredible 400% radius. Essentially, more spacing allows bigger sized brushes.

Min size: Minimum size is responsible for determining the minimum radius the brush can be lowered to.

Opacity limits

Max opacity: Maximum opacity is responsible for determining the maximum amount of opacity the brush can reach.

Min opacity: Minimum opacity is responsible for determining the minimum amount of opacity the brush can be lowered to.

SOURCE

This tab contains the source images that create the foundation of a Procreate brush. One image for the shape of the brush, and one image for the grain of the brush. You are free to modify or alter any brush source file you please.

Shape source: Tap to import a Shape image. Tapping the Shape Source thumbnail will allow you to import you own source images into your brush, or use an image from the Pro Library. Procreate will accept almost all image formats, including JPEG, PNG, TIFF and GIF

Pro tip: Note that white areas of the image will cause the brush to apply paint and black areas will be transparent.

Grain source: Tap to import a Grain image. Tapping the Grain Source thumbnail will allow you to import you own source images into your brush, or use an image from the Pro Library. Procreate will accept almost all image formats, including JPEG, PNG, TIFF and GIF.

Custom Brushes » Re: free aniaml fur and scales texture jpeg

After a bit more messing around, I found that to get the kind of brush I wanted it wasn't quite as I said, so I created a scaly brush as an example. You can get a copy of it here:

http://obscurestar.deviantart.com/art/Procreate-Sea-snake-Brush-611572951

If you edit the brush and take a look, you can see I did a few things.

First off, I created a modified version of the texture by:

* Opening the texture in photoshop.

* Creating guides at 150px in X and Y. (Since the images Pexen provided are 300x300)

* Selecting the gradient tool and then 'Radial Graident'

* Create a gradient that goes from clear to black.

* Click the gradient at the center (where the guides cross) and then drag to the edge of the window (on either axis) This creates the scales faded out to black image you see in Shape Source on my brush.

You can use any tool to do this. In Procreate for example you could:

* Open the image.

* Add a layer.

* In Tools, select 'Insert' and then import a black and white radial gradient.

* Set the gradient layer's blend mode to Multiply.

* Export the image to a JPG or PNG

This modified texture will help create a brush that flows better for following the motion of the stylus.

Next, I played with the settings to get what I wanted.

You can see if you look at the Source for the brush, I rotated the shape source so that I could paint from head-to-tail with the snake brush. The grain source, I just chose a texture I had laying around. White would work but a texture with some grain to it makes the brush a bit more interesting.

The Stroke Spacing is the tricky bit. I couldn't get this to work right on its own so I went into Dynamics and turned on Glazed (you can see my settings in the brush) Then I went back to Stroke Spacing and moved the slider until I got a smooth-looking scale pattern in the preview. (you can see it's not perfect but it was good enough for me)

Then I set Shape's rotation to 'Follow Stroke' and after that just played around with the size and taper until I got something that was comfortable for me to control. (Again, you'll probably want to tweak this to your own preferences)

That's about all there is to it. Though I would also suggest that as you tune your brush, duplicate the brush before you make changes. That way you have a backup.

Try playing with different shape overlays and see what you get!

Tap vào Flat Brush, ta sẽ vào brush studio

Stroke path

space: khoảng cách các đầu cọ khi quét thành vệt
streamline (= smoothing) tạo nét cọ mượt
Jitter: Biến thiên về vị trí
Fall off: nét cọ mờ dần

Taper - nét vuốt

Shape

Scatter (biến thiên về góc xoay)
Tap vào Edit để vào Sharp Source

Grain - texture chất liệu

quẹt thành vệt
nhấn : đậm, to
không nhấn nhỏ, mờ

Chúng ta hãy đi từ cơ bản nhất

Một cái chấm cọ cho thấy đầu cọ có hình dạng gì?

Đường cọ có hình dạng ra sao?

Thuộc tính

ĐẦU CỌ

Hình dạng

Nét cọ liền và nét cọ chấm

Chất liệu

Độ trong suốt và lực nhấn

Nét cọ mờ
Nét cọ mờ trước
Nét cọ mờ sau

Độ xốp

NÉT

Nét liền - Nét đứt

Nét vuốt (nhỏ dần)

Nét vuốt trước
Nét vuốt sau
Vuốt trước và sau

Chất liệu

STROKE

Nét cọ vẽ trên màn hình là do nhiều điểm (points) nối tiếp nhau

Stroke Plot

Spacing (khoảng cách): là khoảng cách giữa 2 điểm. Tăng Space nét cọ càng đứt khúc. (dash)
Jitter: Jitter refers to the amount of distance by which your shape will be offset from the stroke plot. Smaller values will look more like a solid line, while higher values will spread the shape out and hide the visible line you draw

Stroke taper (nét vuốt, đuôi nét)

Start stroke taper: nét cọ bắt đầu từ nhỏ lớn dần. Tăng giá trị này đoạn khởi đầu càng dài
End stroke taper: nét cọ kết thúc nhỏ dần, tạo hiệu ứng vuốt cọ. Tăng giá trị này nét vuốt càng dài
Opacity stroke taper: độ mờ khoảng nét vuốt. Giá trị này càng tăng, khoảng vuốt cọ càng mờ
Size stroke taper: điều chỉnh kích thước nét vuốt nhỏ dần.

SHAPE

Shape là hình dạng của điểm. Sự phân bố của điểm tạo ra đường (Stroke).

Shape là mảng, phần bên trong của mảng là grain các điểm này

Shape như 1 lần đóng dấu, và các dấu liên tiếp tạo nên A shape is just like a stamp. The image you select as the Shape will be repeatedly 'stamped' over the course of a stroke. You could also think of the Shape as a container for the grain.

Shape

Scatter: Changing scatter will change the orientation of your brush as your stroke progresses. Higher values will give a messy, rough feeling while low values will be like a streaky brush. Scatter is not affected by brush direction.
Rotation: The rotation slider affects how your brush reacts to directional change. A range of unique effects can be achieved from a flat calligraphy brush to ribbon effects. The rotation slider has three main points:

‘100% Inverse’ makes the shape rotate inversely to stroke direction.

'Static' locks shape direction to remain static.

'Follow stroke' causes the shape to follow your painting direction.

Randomized: When OFF—Initial shape direction is based on the stroke’s beginning. When ON—direction is different for the beginning of every stroke. This can give each stroke a unique behaviour and a more organic feel.
Azimuth: Azimuth is used for brushes where the direction of the brush shape on the canvas should be the same as the direction of the Apple Pencil, just like a calligraphy pen nib.

Turning Azimuth ON will make the shape follow the perpendicular angle of Apple Pencil.

Grain

As you’ve already learned, Procreate brushes are created using dual images. While the shape acts as a container for the grain, the grain itself acts like a paint roller. When you paint a stroke, the grain is ‘rolled’ inside the shape and on to the canvas.

Movement: When set to 'Stamp' the grain texture will not roll at all. Instead it will smear the grain. When set to 'Rolling' the grain will apply its texture just like a repeating paint roller.
Scale: Grain scale adjusts the size of the grain texture inside the shape
Zoom: When set to 'Follow size' the grain will scale with your brush shape. When set to 'Cropped' the grain is locked and the brush shape will scale independently, from the grain. A great way to understand how zoom works is to use the precision slider preview.
Rotation: Grain rotation is very similar to Grain movement. This setting will smear and slur the grain image–based on directional stroke changes. The rotation slider has three main points along the slider:

‘100% Inverse’ makes the grain rotate inversely to stroke direction.
'Static' locks grain direction to remain static.
'Follow stroke' causes the grain to follow your stroke direction.

Filtered: ON applies Antialiasing to your grain texture. OFF can cause the grain to become jagged and coarse.

DYNAMICS

These settings are applied on-the-fly when you draw and paint. Dynamic settings allow you to create incredibly unique brushes.

color mix:

Falloff: Affects the overall length of the stroke. All effects will be applied within this setting.
Dilution (Độ pha loãng): Dilution is directly related to the Paint characteristic. Varying values of dilution will create different levels of ‘water’ in your paint. When a high amount of dilution is applied to your brush, the brush will mix and pull more paint as you drag it around.
Charge: Charge refers to the amount of virtual paint applied to a brush. For instance, when set to ’0′ the virtual paint will ‘run out’ almost instantly. The Charge setting is great for traditional artists!
Glazed: When ON, your brush will paint in a uniform transparent manner and will no longer 'build up' over time. Because of this, the Glaze effect behaves exactly the same as default Photoshop® brushes.
Accumulative: This option only works when Glaze is active. When ON the shape will ’build up’ as the stroke is made.
Flow: This option only works when Glaze is active. Flow will determine the amount of paint applied to an area every time the brush moves.