Editing Sonic Frontiers/Heightmaps (section)

=== Texels ===
Texels are the area of geometry that corresponds to each pixel on the heightmap texture. If the number of texels is not the same as the number of pixels, the heightmap will fail to render. The open zones use a texel density of 1 texel/m², while Big's Fishing Spot uses an increased texel density of 4 texels/m².

The limit for the number of texels is 67,108,864 texels, corresponding to a map 8192 texels long and 8192 texels wide. Since texel density cannot be lowered below 1 texel/m², this places an upper limit on a map size of 8192m x 8192m (approx. 8.2km x 8.2km).

On the other hand, the number of texels cannot go below 1,048,576 texels, as this is the number generated by one heightmap tile that is 1024 x 1024 pixels. However, the actual map size can go very small by increasing the texel density while decreasing the map size.