: The player intercepts note data and remaps the destination lane index before drawing/input handling. The underlying BMS file remains unchanged. 3.3 Why “IIDX BMS Mirrors” is a common search term Many BMS charts are directly transcribed or inspired by official IIDX songs. Players transitioning from IIDX arcade to BMS simulators expect the same mirror functionality. Because BMS lacks official hardware restrictions, mirror becomes a customization staple. 4. Strategic & Technical Nuances 4.1 Pattern Transformation Examples (IIDX 7K) | Original Pattern (Lanes) | After Mirror | Effect | |--------------------------|--------------|--------| | 1-2-3 staircase ascending | 7-6-5 staircase descending | Changes hand movement direction | | 2+5 chord | 6+3 chord | Hand shape preserved but shifted | | 1-1-7-7 jack (double jack) | 7-7-1-1 jack | Opposite hand now does the long jack | | 3-4-5 trill | 5-4-3 trill | Same physical keys (4 unchanged), trill reversed | 4.2 Mirror vs. Other Mods (BMS context) | Mod | Effect | When to prefer Mirror | |-------------|--------|----------------------| | Mirror | Horizontal flip | Hand imbalance, one-sided patterns | | Random | Fully random lane assignment | Break muscle memory entirely | | S-Random | Random but keeps relative gaps | Preserve some pattern shape | | None | Original chart | Learning intended fingering |
1. Introduction In rhythm games, a mirror (or “mirror mod”) reverses the horizontal order of note lanes. For a 7-key game like Beatmania IIDX (7K + turntable), a mirror transforms lane 1↔7, 2↔6, 3↔5, while lane 4 (the center white key) stays fixed. iidx bms mirrors
| Simulator | Mirror Support | Notes | |----------------|----------------|-----------------------------------------------------------------------| | (LR2) | Yes (F7 key) | Mirrors chart in real-time, no chart modification. | | beatoraja | Yes (menu toggle) | More advanced: supports mirror, random, S-Random, etc. | | BM98 (original) | No | Too early; mirror came later. | : The player intercepts note data and remaps