add mask for dynamic track as 121b

kin, 你可以自己手动更换贴图，具体就是例如你在如下链接下载到RAAC澳百五的原版贴图，然后转为PNG格式，再在游戏内的“导出预设”处导出我预设的贴图，最后手动把你的PNG贴图逐张改为和“导出预设”中一样的文件名然后覆盖即可。
https://wgmods.net/3705/

可不可以原版涂装

乡亲们同胞们，可怜可怜给我点三连吧,这个视频达到1500播放、200赞、100币就行。你们给的三连越多我后面转公开的steam创意工坊模组越多。

【【装甲纷争】最优质的战士：幸运之子澳百五】 https://www.bilibili.com/video/BV1b7421K7T3/

Hey players, the link above is my video on this pack, please "like" it to reach 200+ likes and 1500+ views so that I can offer you guys more public mod on this steam workshop.

hey hey hey! One Centurion mk5-1 RAAC has just been added

hello guys, here I just upload my a43 black prince prototype as Britain heavies pack to steam, which is made in may 2022 as my birthday gift and renewed yesterday. enjoy it.