/ How to use Decal Lab

From PNG to
livery-editor
in three clicks.

Every control, every mode, every shortcut explained. Bookmark this page and share it with your team — no racing-vector knowledge required.

/ Before you upload

What works vs what doesn't

The 15 KB livery cap means simple, bold artwork converts beautifully — and yes, you can use images with multiple colours too, just keep them not too detailed. Heavily detailed illustrations get stripped down by the auto-rescue. Use these two examples as your reality check before you spend credits.

Perfect for 15 KBExample 01
Flat two-tone navy and gold Sample crown logo — perfect for 15KB conversion

Flat shapes, 1–3 solid colours, clean outlines

  • Solid fills — no gradients, no metallic sheen
  • Bold script and chunky shapes survive the trace
  • Limited palette — 2 to 3 distinct colours
  • Imports as a crisp livery decal with vivid edges
Too detailed for 15 KBExample 02
Highly detailed Sample crown logo with gradients, gold filigree, gems and ornate ribbons — too detailed for 15KB

Gradients, metallic sheen, ornate filigree

  • Smooth colour gradients flatten into ugly banded patches
  • Thousands of tiny filigree curves blow the 15 KB cap
  • Auto-rescue downsizes and simplifies — losing scrollwork, gem facets, ribbon highlights
  • Looks muddy or "melted" once imported as a livery decal
  • Pro tip: flatten gradients in your editor first, OR enable Perfect Vector (Pro plan) to bypass the 15 KB cap.

Not sure which side of the line your artwork sits on? Try a free conversion — the result panel tells you instantly.

/ Quick start

Three clicks to a livery-ready SVG

01
Upload
Open Convert, drop any PNG, JPG, or transparent image into the dropzone (or click to pick). Max 15 MB.
02
Tune
Pick a Mode (B/W, Single, or Multi), choose a Quality preset, and tweak sliders. Every change re-traces automatically.
03
Download
When the compatibility chip reads Livery Ready, click DOWNLOAD SVG. Import into the livery editor.
/ Conversion modes

Pick the right mode for your art

B/W
Single-color, high-contrast logos

Threshold the image to pure black on transparent. Best for line-art, sponsor logos, text, and stencil-style decals.

Use the Threshold slider to set where "dark" ends and "light" begins. Lower = only very dark pixels become ink.

Single
One custom color

Same as B/W but paints the traced shape in any color you pick (hex or picker). Ideal for team colors, brand-matched stripes, or mono-color iconography.

Multi
2–8 color quantization

Groups pixels into N vivid colors using saturation-aware K-means, then traces each color as a separate layer. Best for multi-color logos, flags, and team graphics.

More colors = more paths = bigger file. Start with 4, bump only when you need it.

/ Quality presets

Pick the trade-off between fidelity and file size

512 px · coarse
Fast
Lowest internal trace resolution, tightest file. Use for very simple shapes when you need maximum headroom under 15 KB.
1024 px · default
Balanced
The sweet spot we tuned for the livery editor. Preserves curve fidelity while staying well inside the 15 KB ceiling for most single-logo decals.
1536 px · crisp
High
Highest internal resolution — sharpest in-game curves. If the file exceeds 15 KB you'll see the fit chip turn red; split the decal into pieces to keep the quality.
We automatically re-compress (bumping Simplification) if your pick would exceed 15 KB — quality is only reduced as a last resort.
/ Sliders & controls

Exactly what each knob does

Threshold
1 – 254
Where "dark" ends and "light" begins for B/W and Single modes. Lower values capture only very dark pixels; higher values include mid-tones. Watch the output preview — you'll see more ink appear as you slide right.
Colors
2 – 8
Number of palette entries in Multi mode. More colors = better fidelity for complex logos but more traced paths (each path eats into the 15 KB budget).
Simplification
0.1 – 4.0
How aggressively potrace smooths curves. Higher = smoother curves, fewer points, smaller file — but slight corner rounding. Default 0.8 is livery-tuned.
Precision
0 – 3 digits
Decimal digits kept in every path coordinate. 0 = whole numbers only (tiny file, visible stepping on giant decals); 2–3 = smooth but larger. 1 is the sweet spot.
/ Background tools

Transparent backgrounds — two paths

Make background transparent (button)
One-click preprocessing: the current image is replaced with a transparent-bg version, then the tracer runs again. Uses a smart flood-fill from the image border — interior pixels matching the background colour are preserved.
Auto-detect on every trace (always on)
Behind the scenes, if your image has a near-uniform border colour (white/gray/any solid), we auto-crop to the decal content and treat the background as transparent during tracing. No setting required — this is why a flat-white-bg JPEG just works.
If your source has a busy or photographic border, auto-detect backs off and traces the full image as-is. In that case, click Make background transparent to force-strip, or remove the BG in your image editor first.
/ Split into pieces

Dense logo? Divide and conquer.

POST-CONVERT SPLITTER

Under the Compatibility Panel, set Rows × Cols (up to 4×4) and hit GENERATE PIECES. Every tile is converted separately, so each gets its own 15 KB budget.

A colour-coded Fit chip + bar on every tile shows how close it is to the ceiling (green = plenty of room, red = over). Click DL on any tile or DOWNLOAD ALL PIECES to grab them sequentially.

In-game, position the tiles in the livery editor in the same grid — they re-assemble into one large, crisp decal.

STANDALONE SPLITTER

The Split page splits a raw image into PNG tiles (no vectorization). Use it when you want to pre-slice artwork and then run each tile through Convert yourself — gives maximum manual control.

When your result chip reads OVER, a "Jump to Split Pieces" button appears right below the Compatibility Panel — clicking scrolls you straight to the splitter.
/ SVG repair

Paste any SVG, get a livery-safe one back

The Repair page accepts pasted or uploaded SVGs (from Illustrator, Figma, etc.) and strips every element the livery editor can't render: filter, mask, text, image, gradient, script, inline styles, metadata. You get a clean, validated SVG back plus a full diagnostics list.

/ Save, publish, share

Keep your work

Publish to Showcase
Click PUBLISH on Convert. Your decal appears on the community Decal Showcase. Only livery-compatible decals can be published — protects gallery quality.
Discover others
Browse the Showcase, sort by Newest or Most Downloaded, and grab anything that fits your livery. Every download is counted.
/ Pro tips

Get the best in-game result, every time

  • Crop tight in your image editor first
    Trim excess empty space before upload. Our auto-crop catches most of it, but a tight source = tighter viewBox = bigger in-game decal.
  • Start in B/W for logos
    Line-art and most sponsor logos don't need colour. B/W almost always fits under 15 KB with no compromise.
  • Pick High quality + split if detail matters
    For intricate, multi-colour logos, use High quality then immediately split into 2×2 pieces — reassemble in the livery editor for a decal much larger than any single 15 KB SVG could deliver.
  • Use transparent PNGs whenever possible
    They skip the bg-detect step and give the cleanest trace.
  • If colours look flat in-game
    Switch to High quality and/or boost Colors to 6–8. The tracer preserves saturated hues thanks to a saturation-weighted palette selector.
  • Test with a cheap car first
    Import the SVG as a small decal, scale it up in-game — this is the fastest way to verify alignment and colour fidelity.
/ Troubleshooting

Common issues & quick fixes

  • Output looks blank / missing content
    Your source probably has a flat background. Click Make background transparent or try B/W mode. For low-contrast content, bump Threshold up.
  • Decal appears tiny in-game
    Crop your image tighter and re-run — our auto-crop + 1024 px normalization then produce a decal that fills the livery slot.
  • File exceeds 15 KB
    Drop Colors to 2–3, raise Simplification, OR use Split Pieces for a bigger, crisper combined decal.
  • Colours look faded
    Use High quality and keep Colors ≤ 6. Our saturation-weighted palette preserves vivid hues but dense gradients still soft-average.
  • The game rejects the SVG on import
    Paste it into the Repair page — it strips filters, masks, text and other unsupported elements, and returns a validated copy.
  • Split tiles don't line up in-game
    Import tiles in the exact grid order they were generated (R0C0 top-left → RnCn bottom-right). The livery editor snaps them precisely if you zero the offsets.
/ Ready

You've got the playbook. Put it on the grid.