Yes, it is generally recommended to use ballast with a trackbed on a model railway layout. Here are a few reasons...
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Weathered Cobblestones printed on to thick card OO gauge 1/76 scale.
Building Papers Grey Sandstone WallingPrinted area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Red Sandstone WallingPrinted area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Grey Rubble WallingPrinted area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Red Rubble WallingPrinted area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Yellow BrickPrinted area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Grey SlatesPrinted area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Grey Paving StonesPrinted area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Flintstone WallingPrinted area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Grey Sandstone Walling (Ashlar Style)Printed area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Red Sandstone Walling (Ashlar Style)Printed area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.
Building Papers - Engineers Blue BrickPrinted area of each sheet is 256mm x 175mm.OO gauge 1/76 scale.