Change farmer clothes color by lua

[yumi]

Hello,

I'm trying to specify farmer/worker clothes color instead of using either the one defined in parameters or random color for workers.
Is there a lua call that I could use to do so ?
For worker I'm able to overwrite playerColorIndex in some cases, but I would need something else for specific scenario.
I'm trying to use
setShaderParameter(farmer.playerMesh, "colorScale", 1, 0, 0, 0, false)
but it does not work.
Am I on the right way ?
Thanks

[yumi]

Answer has been provided here https://www.fs-uk.com/forum/index.php?topic=200823