Thanks all for the replies. It seems my theory of more detailed photos the better isnt quite right.
Ive attached the map in question which consists of 351 images. I flew a mission at 39m and screwed it up and had errors in the processing with these towers of blur and pixal all through it.
I flew is again at 20m thinking that it would capture more detail but i couldnt upload it in Structure because of the altitude.
This is the result in uploading it in Structure from the original 39m flight.
As you can see it didnt turn out the best hence my reason for trying it lower......which is clearly wrong
@Gary I and starting to understand your comments about 3d modelling.