During school projects, artists often gave me sprites with dimensions like 543x981 or 1381x737.
Those can't be compressed to DXTn/BCn formats, thus bloating our final build size.
However, By resizing their dimensions to multiples of four, we witness significant smaller size:
 Original |
 Quad-Divisible (Way Smaller) |
- Resize textures to be quad-divisible with minimal quality loss
- Batch process multiple textures at once
- Allow considering imported size, instead of original size
Package Manager - Install Package from Git URL
https://github.com/Maoyeedy/QuadSpriteProcessor.git
Or use OpenUPM CLI
openupm add com.maoyeedy.quad-sprite-processor
Note: Only supports Unity 2021.3 Onwards. (As it utilizes Texture2D.Reinitialize)
It's recommended to use it when making the final release builds, instead of whenever you import a new sprite.
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Tools/Quad Sprite Processor
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Set path, Scan, Select, Process
- (Multi-Select and) right-click assets in project panel.
- Resize to be Quad-Divisible
- Backup the original sprites? (Not high priority, as I myself'd just rely on VCS to rollback.)
- Better options with more validationa and callbacks
- Add tranparent pixel instead of resize for transparent PNG
- Option to "Round to nearest power of two" (For mipmap needs)
- Allow using it as AssetPostprocessor, with some matching rules. So that it auto-converts every sprite you import
As most of my projects are built for WebGL, I've always been trying to squeeze the build sizes for faster loading time.
I once optimized a 2D game WebGL Build from 100MB to 40MB with a custom Powershell script to recursively process all textures. However, that requires CLI and ImageMagick, so I made it integrated into Unity Editor to be more user-friendly.
Any bug reports/feature requests are welcome! Open an issue and I will look into it asap.
- 254x254 - needs small adjustment
- 257x257 - slightly above max size
- 252x256 - one dimension already divisible
- 255x253 - different remainders
- 445x447 - similar to original problem
- 255x255 - at edge of max size
- 259x257 - just above max size
- 445x445 - square version of original
Command to generate test image:
magick -size {width}x{height} canvas:black test_{width}x{height}.png