replacenew TUNNEL_UNDERLAY_tropic_grass_00 (RAILTYPE_TUNNELS, "gfx/LAND_for_tunnels_x1-8bpp.png" ,0) { tunnel_underlay_x1(0,0,0,64 ) }
alternative_sprites(TUNNEL_UNDERLAY_tropic_grass_00, ZOOM_LEVEL_NORMAL, BIT_DEPTH_32BPP, "gfx/LAND_for_tunnels_x1.png" ) { tunnel_underlay_x1(0,0,0,64 ) }
alternative_sprites(TUNNEL_UNDERLAY_tropic_grass_00, ZOOM_LEVEL_IN_4X, BIT_DEPTH_32BPP, "gfx/LAND_for_tunnels_x4.png" ) { tunnel_underlay_x4(0,0,0,64 ) }
alternative_sprites(TUNNEL_UNDERLAY_tropic_grass_00, ZOOM_LEVEL_IN_4X, BIT_DEPTH_8BPP, "gfx/LAND_for_tunnels_x4-8bpp.png" ) { tunnel_underlay_x4(0,0,0,64 ) }
replacenew TUNNEL_UNDE