Quote - Blender node would be my suggestion.  First input would be your procedural, second input the decal, and the value would be set to 1 with a mask black & white mask of the flag.  Very important that the airship has a UVMap to properly place the Union Jack.

Yes, I think that's the same method I'm trying from BB's thread.  Got the mask and the UV map, just can't get the surface to look right at the moment.  I have to take the dogs for a walk so I'll have a think!  Thanks for the suggestions!

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