| /proc/custom_sprite_compat_v1 | Old-format drawings as the branch's own writer stored them, built without any codec proc so a codec change can't regenerate them.
v1, two colours: pixel (0,0) is colour 1 and (1,0) colour 2 in the Front view; 1,022 empty pixels follow (68 runs of 15 and one of 2). |
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| /proc/custom_sprite_compat_v1_legacy_emissive | v1 as an even older save wrote it: one emissive flag for every view, an explicit filter, a solid Front view (68 runs of 15 and one of 4). |
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| /proc/custom_sprite_compat_v2 | v2, all 63 colours in the Front view's first row, a solid Back view of colour 63, per-view emission. |
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| /proc/custom_sprite_compat_v3 | v3, the 64-wide taur zone, one colour everywhere in the Front view (136 runs of 15 and one of 8). |
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| /proc/custom_sprite_compat_v4 | v4, a tall hair canvas: first and last Front pixels are colour 1; Back is solid colour 2. |
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| /proc/custom_sprite_compat_sidecar | A whole account sidecar as the branch wrote it, one slot with every key, and what loading it must give back. |
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