[little-endian]

8 bytes magic "Static3D"
4 bytes major (uint)
4 bytes minor (uint)

4 bytes mesh count (uint)
12 bytes unused

for each mesh:
4 bytes offset (uint)

[aligned to 16 bytes, mesh section]
4 bytes vertex count  \
4 bytes vertex offset \   (uints)
4 bytes index count   /
4 bytes index offset  /
n bytes 0-terminated shader name (UTF-8)

[aligned to 16 bytes, vertex section]
n *
  4 bytes x  \
  4 bytes y  |
  4 bytes z  |
  4 bytes nx \   (floats)
  4 bytes ny /
  4 bytes nz |
  4 bytes s  |
  4 bytes t  /

[aligned to 16 bytes, index section]
n *
  2 bytes index (ushort)