 Camouflage is occasionally used to make buildings less conspicuous : for example , in South Africa , towers carrying cell telephone antennae are sometimes camouflaged as tall trees with plastic branches , in response to " resistance from the community " . Since this method is costly ( a figure of three times the normal cost is mentioned ) , alternative forms of camouflage can include using neutral colours or familiar shapes such as cylinders and flagpoles . Conspicuousness can also be reduced by siting masts near or actually on other structures . 
