Hello, sal_vager thanks for your suggestion. You actually inspired me with my little experiment. I bought the game directly from the store on the website. I redownload it again and found it executed without problem on desktop. Then I move whole KSP folder into my gaming directory, the bug struck again. Which reminds me another bug I've encounter with a image process software called hugin. Nevertheless, I rename my directory, make it english-character only, and BOOM! Everything is fixed! My gaming directory used to contain Chinese path, e.g. D:軟é«â€/ksp-win-1-0-4/... That seems to cause the problem. This is probably definately a bug I would say. Though it might not be that inportant since the texture of these two module are the only one that's affected I've seen so far, it would be nice to be noted somewhere like in the wiki.