A cropped source image
Resize, simplify, convert
A transparent PNG template
Decide what the template must communicate
Before opening an editor, write down three values: the final width in pixels, the final height in pixels, and the canvas coordinates of the template's top-left corner. These values prevent the most common overlay problem: a technically correct image placed at the wrong size or location.
A 64 × 64 image contains 4,096 pixel positions. That does not mean all 4,096 need placement—transparent areas and repeated background colors reduce the work—but it gives you a useful upper bound. If the project is too large, simplify it before color conversion rather than after.
Keep scale unambiguous
One source pixel should become one Wplace position in the final template. Do not let an editor blur or resample it after conversion.
Make the template in seven steps
1. Crop to the artwork, not the screenshot
Remove browser chrome, captions, borders, and empty margins unless the margin is intentionally part of the coordinate plan. Cropping first makes every later dimension easier to verify.
2. Choose final pixel dimensions
Resize once, using nearest-neighbor resampling for existing pixel art. For photographs or illustrations, test more than one small size: a face that works at 96 pixels wide may become unreadable at 48. Judge the image at 100% zoom, not only in a magnified preview.
3. Simplify details that cannot survive
Remove one-pixel noise, thin diagonal lines, tiny text, and subtle shadows that collapse during reduction. Strengthen important silhouettes. This editorial pass creates more value than simply accepting the first automatic conversion.
4. Convert to the enabled Wplace palette
Use the Wplace color converter and decide whether the paid color group is permitted for the project. Start without dithering. If a gradient becomes too flat, compare a dithered version at actual size and choose deliberately.
5. Mark pixels that should not be placed
Use transparency for “leave this area unchanged.” Do not use white as a substitute for transparency: white is a real palette color and can be interpreted as a pixel that should be painted.
6. Export PNG at exact size
PNG preserves hard pixel edges and transparency. After export, reopen the file and confirm its pixel dimensions. Avoid messaging apps or image hosts that may resize, compress, or strip transparency.
7. Record coordinates and version
Use a filename such as project-name_64x64_x123_y456_v03.png. Store the top-left coordinates, dimensions, palette decision, and revision number alongside the file. A versioned template prevents a team from following two different images.
Template quality check
Do this check before sharing the file or loading it into an overlay:
Dimensions: The exported PNG matches the planned width and height exactly.
Palette: Every visible pixel matches a color enabled for the project.
Transparency: Areas that should remain untouched are transparent, not white.
Edges: Important outlines remain legible at 100% zoom.
Coordinates: The top-left canvas position is written down and independently checked.
Version: Everyone is using the same filename and revision.
Common template mistakes
| Symptom | Likely cause | Fix |
|---|---|---|
| Overlay looks blurry | Image was scaled with smoothing | Resize with nearest-neighbor and export again |
| Template is offset | Wrong anchor coordinate or extra margin | Crop the file and recheck the top-left position |
| Some colors cannot be placed | Unavailable colors were enabled | Disable that group and reconvert |
| Background is being painted white | White replaced transparency | Restore an alpha channel and export PNG |
| Team results do not match | Multiple revisions are in use | Publish one versioned file and archive older copies |
Load the finished template into Blue Marble
Once the PNG passes the checklist, follow the Blue Marble operating guide to load it, align the anchor point, filter colors, and test a small area. If you still need the userscript itself, start with the independent Blue Marble installation guide.
Next step
Convert the source image before exporting your template
The converter runs locally in your browser and lets you compare palette and dithering choices before download.
Open the Wplace converter