Why wont my script make my legs Transparency Equal 1?

I'm 80 percent sure that this is your problem

    RightUpperLeg = hit.Parent.LeftUpperLeg

    RightLowerLeg = hit.Parent.LeftLowerLeg

    RightFoot = hit.Parent.RightFoot

Here is the problem

RightUpperLeg should equal hit.Parent.RightUpperLeg instead of LeftUpperLeg and RightLowerLeg shoud equal hit.Parent.RightLowerLeg instead of LeftLowerLeg

Your Right Upper and Right Lower are equal to Left Upper and Left Lower.

The transparency for your LeftUpper and LeftLower are the only changing results because there is nothing here that changes the transparency for your RightLowerLeg and RightUpperLeg

RightUpperLeg should be equal to RightUpperLeg

and

RightLowerLeg should be equal to RightLowerLeg

Your script should look like this

script.Parent.Touched:connect(function(hit)

if hit.Parent.Humanoid then

    --Character Body Parts

    LeftUpperLeg = hit.Parent.LeftUpperLeg

    LeftLowerLeg = hit.Parent.LeftLowerLeg

    LeftFoot = hit.Parent.LeftFoot



    RightUpperLeg = hit.Parent.RightUpperLeg

    RightLowerLeg = hit.Parent.RightLowerLeg

 RightFoot = hit.Parent.RightFoot



        LeftUpperLeg.Transparency = 1

        LeftLowerLeg.Transparency = 1

        LeftFoot.Transparency = 1



        RightUpperLeg.Transparency = 1

        RightLowerLeg.Transparency = 1

        RightFoot.Transparency = 1

end

end)