Hello ,
I was unable to reproduce the crash with the information provided. I have a few questions that will help narrow down what issue it is that you are experiencing.
Quick questions:
- Can you reproduce this in a clean project?
- If so could you provide a detailed list of steps to reproduce this issue on our end?
- Could you provide screen shots of the blueprints that are being used?
- Have you tried using a scalar parameter?
Example of a scalar parameter:
This is a picture of my 3D widget and a cube that is slowly disappearing. The progress bar shows how transparent the cube is.
The is my material. This is a simple example of how a scalar parameter can be set up.
This is my Scalar parameter
This is my Widget event graph
This is my Widget
