How to set custom thumbnails for C++ and Blueprint classes?

[3dRaven]

Custom thumbnail for class

@Jackblue thank you for replay. what if I do something like: #ifdef WITH_EDITOR #include "SlateCore.h" class FMyDefaultGameModuleImpl : public FDefaultGameModuleImpl { ....... } IMPLEMENT_PRIMARY_GAME_MODULE(FMyDefaultGameModuleImpl, MG3, "MG3"); #else IMPLEMENT_PRIMARY_GAME_MODULE(FDefaultGameModuleImpl, MG3, "MG3"); #endif cuz I only need to change some class thumbnails while developing. and thats it !