Hi,
For those wondering why some of my models are labelled V1.5, V2.3, V3.1, etc., here's my ‘logic’ behind my version numbering:
V1 :
V1 = Initial release.
V1.1 = Quick patch or small corrections.
Example: https://civitai.com/models/1116289
V1.5 = Minor update, usually without LostWord outfits.
Example: https://civitai.com/models/1887639
V2 :
V2 = Major update of previous versions, including all alternate outfits released at the time (LostWord and main games).
V2.1 = Quick patch, small improvements (better stability, reworked V2 outfits, etc.), or the addition of a forgotten outfit.
Example (Toyosatomimi no Miko): https://civitai.com/models/1229464
V2.3 = A new LostWord outfit was released shortly after I published V2.
Example (Shion Yorigami): https://civitai.com/models/1283575
V2.5 = One or more minor outfits added later to an existing V2 release (typically if it's just a single "minor" outfit).
Example (Clownpiece): https://civitai.com/models/1196749
V3 :
V3 = Major update to V2, featuring new outfits and a rework of most existing outfits, or a major overhaul of previous V2.x versions.
V3.1 = Quick patch, small improvements, or the addition of a forgotten outfit.
From V3 onward :
Things become much simpler (x > 3) :
Vx = Major update.
Vx.1 = Minor update, fixes, or small additions.
One exception (because there always has to be one): Seija Kijin.
For her, the entire versioning logic is reversed:
Final Version → Penultimate Version → Antepenultimate Version → ...