This came with the latest update. I will fix and update this skin.
To fix this yourself, open the description.lua and insert the following to line 40:
{"mig29c_tex7_BN31", 0 ,"mig-29c_tex07",false};
{"mig29c_tex7_BN31", ROUGHNESS_METALLIC ,"mig-29c_tex07_RoughMet",false};
{"mig29c_tex7_BN31", 3 ,"empty",true};
{"mig29c_tex7_BN32", 0 ,"mig-29c_tex07",false};
{"mig29c_tex7_BN32", ROUGHNESS_METALLIC ,"mig-29c_tex07_RoughMet",false};
{"mig29c_tex7_BN32", 3 ,"empty",true};
{"mig29c_tex8_BN31", 0 ,"mig-29c_tex08",false};
{"mig29c_tex8_BN31", ROUGHNESS_METALLIC ,"mig-29c_tex08_RoughMet",false};
{"mig29c_tex8_BN31", 3 ,"empty",true};
{"mig29c_tex8_BN32", 0 ,"mig-29c_tex08",false};
{"mig29c_tex8_BN32", ROUGHNESS_METALLIC ,"mig-29c_tex08_RoughMet",false};
{"mig29c_tex8_BN32", 3 ,"empty",true};