Dont change robot color on xacro file

[esamet]

Hi ı make edit on the lino2 robot xacro file with mecanum wheel, ı add my .dae file it works but ı cant change color on body, still looks yellow, ı change the color parameter on base.urdf.xacro but dont apply my changes

[VH-Tech]

I am also facing similar issue, namely I am trying to increase base length off linorobot 4wd but on changing it's xacro file no visible changes are seen.