fixed xynova texture generation problem

README.md

@@ -147,6 +147,14 @@ share one set of settings and one seed, and both read the same camera-space
 patch grid, so a given physical patch carries the same colour in either file —
 the images differ only in how the unwrap arranges the patches.
 
+**Square in which space?** The patch grid is defined in the camera image, not in
+flat UV coordinates or physical surface distances. For square camera pixels,
+`nx / ny` must match the camera image aspect ratio (80×80 for a square frame,
+80×45 for 16:9). Changing the PNG dimensions does not change the camera grid.
+Curvature and UV unwrapping can make these camera-space squares look rectangular,
+skewed, or curved in the flat texture; that alone is not a defect. Thin spikes
+outside the UV surface, however, are not expected projection distortion.
+
 Generated artifacts are **committed** so a revision's textures can be synced to
 hardware production. They are stored as real files, not Git LFS pointers, so a
 plain `git clone` yields usable images and `.blend` files; `.gitattributes` only