pub const VERSION: i16 = 4;Expand description
Bump when the computation changes: stored signatures of another version
are ignored and computed again – also when the preview meshes change
(preview::CACHE_VERSION), since the signature is computed from them.
2: the STEP readers of preview cache version 2 (tessellated AP242,
partial previews without a signature). 3: preview cache version 3
(Inventor parts with Zstandard segments, #271). 4: preview cache
version 4 (Creo parts in millimetres).