Affinity Designer Pixel Persona Tools Not Working Fix

In this tutorial, you'll learn about Affinity Designer Pixel Persona Tools Not Working Fix. We cover key concepts, practical examples, and best practices to help you understand and apply this topic effectively.

The Problem

You switch to Pixel Persona in Affinity Designer but brush tools do not paint, the eraser has no effect, pixel selection tools are unresponsive, or rasterization fails.

Quick Fix

Step 1: Ensure you are in Pixel Persona

The persona determines available tools.

Wrong — using vector tools in Designer Persona:

Vector Persona active → Pixel Brush appears but paints vectors

Right — switch to Pixel Persona:

Click 'Pixel Persona' button (top-left, person icons)
Only then do pixel tools work correctly

Expected output: Pixel tools work as expected.

Step 2: Check that the layer is pixel-based

Vector layers cannot be painted on.

Wrong — trying to paint on a vector layer:

Select vector shape → Pixel Brush → nothing happens

Right — rasterize or create pixel layer:

Layer → Rasterize
Or: Layers panel → '+' → New Pixel Layer
Paint on the new pixel layer

Expected output: Brush strokes appear on the pixel layer.

Step 3: Verify brush settings

Brush may have wrong settings.

Wrong — brush opacity at 0%:

Brush shows no stroke → check opacity → it's 0%

Right — check brush settings:

Color: black (not white on white)
Opacity: 100%
Flow: 100%
Brush size: visible (not 1px)

Expected output: Brush draws visible strokes.

Step 4: Fix eraser not working

Eraser needs a pixel layer.

Ensure target layer is pixel layer (not vector)
Select Eraser tool → same brush settings
Eraser works on the active pixel layer

Expected output: Eraser removes pixel content.

Prevention

• Always create a dedicated pixel layer for raster work
• Label pixel layers clearly
• Rasterize vector layers only when needed
• Use non-destructive adjustment layers instead of erasing

Common Mistakes with pixel persona

1. Non-exhaustive pattern matches that compile with warnings then crash at runtime
2. Misunderstanding that String is [Char] with poor performance for large text operations
3. Using foldl instead of foldl' causing stack overflow on large lists

These mistakes appear frequently in real-world AFFINITY code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ