Change Material Instance Scalar Parameter without reloading material

I have created an effect using material instances where the user can select two point clouds and adjust a slider bar to transition between them.

Demo: [Point Cloud transition with time slider on Vimeo][1]

I noticed that while testing it out that the material instance reloads on every key press causing that flashing effect, and I am wondering if it is possible to change a scalar parameter value on a material instance without it reloading.

Here is the blueprint code for reference:

Thank you in advance

hey there !
here is what you need to do

You’re creating the material every time the key is pressed. You only need to create it once, then adjust the param.