PaintTool SAI: The Ultimate Beginner‘s Guide (2024 Edition)

PaintTool SAI has long been a favorite program of digital artists, known for its easy-to-use interface, natural brushes, and smooth blending capabilities. As a Mac software expert and long-time SAI user, I‘m here to share an in-depth beginner‘s guide to this powerful yet approachable digital art software.

Whether you‘re a complete beginner to digital art or coming from another program like Photoshop, this guide will give you a comprehensive overview of PaintTool SAI‘s features and help you start creating professional-level artwork.

Why Choose PaintTool SAI?

Before we dive into the specifics of using SAI, let‘s look at why it‘s a top choice for so many artists:

  • Intuitive interface with minimal learning curve
  • Highly customizable brushes that mimic traditional media
  • Smooth blending and anti-aliasing for painterly effects
  • Unique features like linework layers and perspective rulers
  • Lightweight and stable with fast performance
  • Affordable pricing ($50-60 one-time license)

As primarily a Mac user, my only wish is that PaintTool SAI had a native macOS version. However, it runs very well using Windows emulation software like Parallels or VMware Fusion. The slight performance hit is worth it for SAI‘s drawing experience, in my opinion.

PaintTool SAI vs Other Software

To help determine if PaintTool SAI is the right fit for your needs, here‘s a comparison to some other popular digital art programs:

Feature SAI Photoshop Clip Studio Paint
Brush engine ⭐⭐⭐⭐⭐ ⭐⭐⭐⭐ ⭐⭐⭐⭐⭐
Painting tools ⭐⭐⭐⭐ ⭐⭐⭐⭐ ⭐⭐⭐⭐⭐
Photo editing ⭐⭐ ⭐⭐⭐⭐⭐ ⭐⭐⭐
Text/typography ⭐⭐ ⭐⭐⭐⭐ ⭐⭐⭐
Vector tools ⭐⭐⭐ ⭐⭐⭐⭐ ⭐⭐⭐⭐
Comic features ⭐⭐ ⭐ ⭐⭐⭐⭐⭐
Animation ⭐ ⭐⭐ ⭐⭐⭐⭐
UI customization ⭐⭐⭐ ⭐⭐⭐⭐ ⭐⭐⭐⭐
Performance ⭐⭐⭐⭐⭐ ⭐⭐⭐ ⭐⭐⭐⭐
One-time price $52 $239/yr $50-219

As you can see, PaintTool SAI excels at digital painting and drawing, with a focus on natural media brushes and fast, stable performance. It may lack some features for photo editing, vector art, and comics compared to Photoshop or Clip Studio Paint. But for pure illustration and painting, it‘s hard to beat SAI‘s simplicity and brush quality.

Many professional artists use PaintTool SAI alongside other software in their workflow, such as sketching and coloring in SAI, then moving to Photoshop for final editing and effects. Its affordable price also makes it an excellent choice for students and beginners.

Getting Started

Upon opening PaintTool SAI, you‘re greeted with a simple, uncluttered interface:

[Screenshot of SAI interface with labels]

The main elements are:

  1. Canvas – Your drawing area
  2. Toolbar – Contains various tools like brushes, selection, move, etc.
  3. Color Wheel – For selecting colors and creating palettes
  4. Layers Panel – Where you organize and edit layers
  5. Brush Size/Opacity – Adjusts the current brush settings on the fly
  6. Navigator – Displays a mini view of your canvas for quick navigation
  7. Menu Bar – Houses submenus for all of SAI‘s features and settings

One of SAI‘s strengths is its customizability. Nearly every panel can be undocked, resized, and rearranged to suit your preferences. You can even create multiple custom UI layouts for different tasks (e.g. sketching, inking, coloring).

To create a new canvas, go to File > New. The New Canvas window lets you choose preset sizes or enter a custom width/height, resolution, and background color. For web work, 72-150dpi is common. For print, 300dpi or higher is recommended. The maximum canvas size is 10,000 x 10,000px.

Brushes and Tools

At the heart of PaintTool SAI is its brush engine. SAI includes a variety of customizable brush presets, from basic Round and Airbrush to specialty Watercolor and Sparkle brushes.

[Brush palette screenshot]

In the Brush Settings panel, you can tweak every aspect of a brush‘s properties:

  • Size/Density – Controls the brush diameter and paint opacity
  • Hardness – Adjusts edge softness from hard to fuzzy
  • Dilution – Mixes brush color with underlying layer (i.e. paint thinners)
  • Persistence – Continues applying stroke if pen is held down
  • Anti-aliasing – Toggles edge smoothing on/off
  • Texture – Adds a paper texture to strokes, from presets or imported images

Arguably the most important setting is Blending. This controls how the brush interacts with existing pixels on the layer. Options include:

  • Normal – Default painting mode, covers with current color
  • Multiply – Great for shadows and shading
  • Screen/Overlay – Lightens and brightens colors
  • Watercolor – Smooth wet edges with semi-transparency
  • Brush Density – Dynamic opacity based on pen pressure

[Example of blending mode effects]

Paired with SAI‘s Brush Controls (Size, Opacity, Water), blending modes allow you to paint in very natural, traditional media-like ways. Especially with a pressure-sensitive tablet, you can create beautifully soft, textured strokes.

To organize your brushes, you can use the Preset Slots at the bottom of the Brush Settings. Just drag a configured brush to an empty slot to save it. Brushes can also be exported to share with others or imported from fellow artists. DeviantArt has a wealth of free SAI brushes to expand your collection.

Other key tools in SAI include:

  • Selection – For making selections via rectangle, ellipse, lasso, or magic wand
  • Movable – Repositions layers or selections
  • Transform – Scales, rotates, skews, and flips content
  • Text – Adds editable text using any system font
  • Gradation – Creates smooth linear or circular color gradients
  • Blur/Sharpen – Softens or enhances detail non-destructively

There are dozens more sub-tools and options to discover. Clicking the gear icon next to a tool often reveals additional settings to customize its behavior.

Layers and Workflow

Layers are the foundation of a non-destructive digital art workflow. They let you separate elements of a piece for easy editing and experimentation. PaintTool SAI boasts a full-featured layers system including:

  • Raster (pixel) layers
  • Linework (vector) layers
  • Layer groups and clipping masks
  • Over 25 layer blending modes
  • Opacity, visibility, and lock controls
  • Layer masks for selective erasing/masking

[Example of typical SAI layer setup]

A common workflow in SAI is:

  1. Sketch – Rough out your idea on a raster layer with a pencil brush
  2. Lineart – Create a new linework layer and ink the final lines
  3. Flats – Fill regions with base colors on a layer beneath the lines
  4. Shading – Add shadows, highlights, and details on layers clipped to the flats
  5. Polish – Apply final adjustments like hue/saturation, blur, etc.

By keeping elements separated and using clipping masks, you can easily tweak individual parts without disturbing the rest. This is especially handy for coloring, where you can quickly test different palettes or make lighting changes in a non-destructive way.

SAI‘s paint bucket is fantastic for filling lineart. Enable Anti-aliasing and Refer other layers to neatly fill regions defined by your inking layer. Paired with clipping masks, this makes coloring a breeze compared to manual selections.

Linework layers are one of SAI‘s standout features for inking. These create smooth vector lines that can be edited with handles, varying thickness, and even animating stroke order. You can sketch freely on a raster layer, then create clean lineart on a linework layer above it.

[Linework layer demo gif]

Rulers and Perspective

For technical drawing, PaintTool SAI provides handy ruler tools including:

  • Straight line
  • Curved line
  • Perspective (1, 2, and 3 point)
  • Symmetry (horizontal/vertical)
  • Concentric circles and ellipses

Access rulers under the View menu or press Ctrl+R. Drag out guides to define vanishing points, horizons, and other perspective aids. Combine with the line tool and Snap to Ruler option for precise architectural or mechanical drawings.

Performance and Troubleshooting

PaintTool SAI is generally very stable and lightweight compared to larger programs like Photoshop. It can run well even on lower-spec PCs thanks to its efficient codebase. However, there are a few common issues to be aware of:

  • Brush Lag – If you experience delayed strokes, try reducing canvas size, upgrading RAM/CPU, or closing background apps. Some older Wacom tablet drivers can also cause lag.

  • Crashing – Sudden crashes are often due to outdated/buggy tablet drivers, Windows updates, or conflicting software. Ensure your tablet drivers are updated and try disabling other pen apps.

  • Saving – SAI has a great AutoSave feature (Misc > AutoSave Settings), but it‘s still wise to save manually often. Use the File > Save Duplicate option to create incrementally numbered files in case of corruption.

Some performance tips:

  • Work at lower resolution while sketching, then scale up for final linework and coloring. Resolutions above 300dpi can slow performance.

  • Merge layers when possible to reduce file size and overhead. Flattening all can reduce file size by 70% or more.

  • Use Edit > Purge Undo to clear the undo history if SAI starts lagging after long drawing sessions.

  • Allocate more RAM to SAI in Edit > Options > Memory & Scratch Disk. 50-75% of your system RAM is ideal if you have 16GB+.

Future of SAI

As of 2021, development of PaintTool SAI was taken over by Japanese software company CELSYS, known for their popular Clip Studio Paint software. CELSYS stated they planned to continue development and support of SAI while maintaining its unique identity.

Since then, CELSYS has released PaintTool SAI 2, a major update bringing new features like a liquify tool, snap guides, and more layer options. It‘s a free upgrade for all SAI 1 users. They also reduced SAI‘s price to just $36 (from $52) as for 2025.

Looking ahead, it will be interesting to see how CELSYS balances SAI and Clip Studio Paint. Some artists are hoping for a macOS version of SAI, which would be a huge boon. But with Clip Studio already on Mac/iPad, it may not be a priority.

At the very least, CELSYS seems committed to preserving SAI‘s unique strengths in digital painting while gradually modernizing it for the demands of today‘s industry. As a long-time user, I‘m excited to see where they take it.

Conclusion

PaintTool SAI remains one of the most popular, beloved digital art programs since its initial release in 2004. Its focus on simplicity, natural brushes, and smooth blending have made it a go-to for illustrators, concept artists, and hobbyists around the world.

While it may lack some advanced features of Photoshop or Clip Studio Paint, SAI more than makes up for it with its intuitive interface, stellar brush engine, and lightweight footprint. And with the recent SAI 2 update and CELSYS‘ stewardship, SAI‘s future is bright.

I hope this beginner‘s guide has given you a strong foundation to start exploring SAI and creating your own digital art. Remember, the best way to learn is to experiment with all of SAI‘s tools and settings to find what works for you.

For more SAI tips, tricks, and resources, check out:

Happy drawing!

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