Not really a bug, but just a bit of annoying. [%E6%93%B7%E5%8F%96] Above is the light gray concrete, the brighter one is the facade made out of light gray concrete. Version 6.11.05.

Wait did you make an AE Facade out of it?!?! No wonder it doesn’t work, ofcourse all AE Facades will be White as heck due to Asphalt being White + Color Modulation. That is an Issue that would need to be fixed on AE Side or Buildcraft Side, sorry about that.