You likely resized an image incorrectly. If you edited a particles.png or entities.png, ensure the dimensions are divisible by the grid size (usually powers of 2). Restoring the original file usually fixes the crash.
Run a local server with a modern map (e.g., Sunny Side Up). Walk over every tile type. If you see purple squares, your pack is not fully UPD. Find a better one. Ddnet Texture Packs UPD
Even with updated packs, things go wrong. Here is the fix: You likely resized an image incorrectly
| Problem | Likely Cause | Solution |
| :--- | :--- | :--- |
| Game crashes on launch | Missing mapres reference | Delete the pack and restore backup. The UPD pack was corrupted. |
| Blue/Black squares instead of teleporters | Outdated tile index | You need a newer UPD. The pack developer missed DDNet 17.4 changes. |
| Tee skin is invisible | Conflict between skin and texture pack | Reset skin to default, then reload. |
| No sound effects changed | Texture packs don't control sound (common myth) | You need a separate sound mod. | Run a local server with a modern map (e
This is the Endianness Issue. You downloaded a very old Teeworlds skin. Modern clients generally handle this, but if they don't, open the PNG in an image editor and save it again (this re-writes the header bytes correctly). Or, look for a "fixed" version of the pack.
A forgotten part of texture packs is the font. UPD packs often include a custom DejaVuSans.ttf. If the text looks jagged, delete the font file from the pack and rely on the system font, or download the updated emoji font from DDNet Git.
| File | What it changes |
|------|----------------|
| grass_main.png | Game tiles (ground, walls) |
| game.png | Hearts, shields, weapons, hook |
| tee.png | Your tee skin (unless using separate skin file) |