code/modules/unit_tests/~nova/custom_sprites/composite.dm 
| /proc/custom_sprite_test_region_drawing | A drawing with the same pixels in every view. Points are list(x, y, "#rrggbb"). |
|---|---|
| /proc/custom_sprite_test_region_rows | A region map whose first row is first_row (padded with "0") in every view; every other row is empty. |
| /proc/custom_sprite_test_region_fixture | Chest owns x 0-3, the left arm 4-7 and the left hand 8-9 on the first row. |