1. Point (nearest)
Single source pixel per output. Sharpest, can drop thin features.
2. Box (3×3 average)
Exact block mean. Smooth.
3. Lanczos
Sinc filter. Sharp, may ring on hard edges.
4. Median (3×3 block) → sample
Block median, then nearest sample. Outlier-resistant, sharp.
5. Mode (3×3 block) → sample
Most common color per block. Best palette preservation.
6. Box → posterize 16 colors
Box downscale + palette quantize to 16 (no dither). Crisp retro look.
7. Lanczos → posterize 16 colors
Sharper downscale + palette quantize. May ring more than box.
8. Box → posterize 8 colors
Aggressive palette reduction. Most NES-style.
