As per recent patches, we do support 16-bit PNMs.
@@ -7321,7 +7321,6 @@ static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp)
// Known limitations:
// Does not support comments in the header section
// Does not support ASCII image data (formats P2 and P3)
-// Does not support 16-bit-per-channel
#ifndef STBI_NO_PNM
Fabian Giesen