View attachment 21265 I should probably create a tutorial, but is quite easy.
For the apron, I just created a 1024x1024 tile that covers an area of ~1500'x1500'. The base texture is made up concrete squares, with added weathering details (photoshop). This gives you a pretty decent resolution. I then created a 1500'x1500' ground polygon for the apron.
The rest is just ADE. Add the 1024x1024 texture to ADE using GP Management tool, and place it over your 1500'x1500' ground polygon and use the editing tool to orient it correctly. Then, just add markings using the GP line tool at a higher layer level.
Taxiways are similar, except I placed three 500' parallel segments in a 1024x1024 texture as shown below. Create 500'x125' polygons using the shape tools and apply the texture. Use the GP Editing tool to use different texture segments (so they are not constantly repeated, changing texture orientation helps too!)