Hi Alexander. The textures are clean (if that's what you are referring to), as almost every photo of the real Heron's shows them to have been kept relatively spotless when in service. They almost never chipped and streaked, and they created virtually no exhaust or oil stains, and so that's the way we went. There is actual dirt and staining on the model, but minimally, as appeared on (and in) the real Herons to the best of our photo interpretation.
All panel lines and rivets are there, but to scale, and so may not show up well in the longer 'focal range' a screenshot needs to have for a larger aircraft. But every little vent and airscoop on the fuselage (that we could see) is there, for example. You may see these if you look more closely at the screenshots, or perhaps we can add some close-ups....
Of course, for those who prefer a more used or badly cared for look, that's easy to do! There is a paint kit available.