Currently I am trying to change a material by adding a new scalar parameter which allows me to fade in / out the material via Blueprints.
So, I’ve added a new parameter called “cOpacity” into the parent material and added a subtract node in order to manipulate the opacity of the material.
Inside the editor for the parent material, changing the value of cOpacity works perfect fine and shows the wanted result of having 0 = visible and 3 = invisible.
In a material instance of this material changing the value of cOpacity shows no effect.
Trying to change the value via BP does not show any effect too.
I already did this for a different project last year (which I no longer have) and I’m pretty sure that it should work just like that.
Interestingly other parameters show a change when changed.
Is this a bug in 4.15? Could the material (which is from a marketplace asset) be from an older version and that’s why the existing parameters are working fine and the bug only exists with newly created parameters?
Any help is appreaciated.