Painted over the train's exterior, the famed cat-not-cat also dominates the interior, appearing on walls, headrest covers, serving carts, meal boxes and, we imagine, an array of clothing items worn by giddy riders.

请问：为什么painted用过去分词（表被动），而appearing同现在分词（表主动）？

【答】the famed cat 是“被画”在火车的外部，“出现”在车厢的内壁，头枕罩、服务车、餐盒上，还用“被出现”吗？这还需要回答“为什么”吗？

我发现，你有些问题似乎太深奥，也有些问题过于浅显了。