For some it's seen as vandalism and a blot on the landscape. For others it's a way of breathing new life into rundown areas and adding colour to drab urban backdrops.
And the latter is certainly true in the case of a group of graffiti artists tasked with brightening up the less inviting parts of one south Wales borough. This trio of budding Banksys from Bridgend have been transforming rundown landmarks with some striking spray paint murals - most recently turning a dark and dingy underpass in Porthcawl into a vividly bright underwater wonderland.
They are the work of Ryan Lee Davies - AKA Another Day, Another Spray - and THEW Creative, which is made up of brothers Matthew and Aiden Cole. All three are from the Avon Valley and their work is part of Bridgend County Borough Council's aim to replace 'hateful and divisive aerosol art with uplifting, welcoming and positive expressions'. You can get more Bridgend news and other story updates straight to your inbox by subscribing to our newsletters here.