Which method should I use?

Start with Mirror — it always produces a mathematically seamless tile. If the mirror symmetry is too obvious, try Edge Blend with a moderate blend width for a more natural look.

What is a power-of-two size and why does it matter for games?

Power-of-two refers to texture dimensions like 256, 512, 1024, 2048. GPU hardware mipmapping algorithms require these dimensions for efficient rendering. Non-power-of-two textures cannot be mipmapped in some APIs.

Images Tool Box

Creative

Create Seamless Repeating Tiles from Any Image

A seamless tile is an image that repeats without visible seams — essential for game textures, website backgrounds, fabric patterns, and 3D material maps. The Tile Maker converts any photo or graphic into a seamlessly tileable texture using three methods: quadrant mirroring, half-offset stitching, and edge blending.