Change Color of Points in Point Cloud

[mamls123]

I want to change the color of individual points in my point cloud based on where I am aiming.
For this I followed this tutorial for line tracing:

Using a Single Line Trace (Raycast) by Channel

The line tracing part works fine, but no color change is happening.

Here is my current Blueprint.

Thanks in advance!

[mamls123]

To answer one issue I solved so far, I had to build collision of the point cloud. Now a LineTraceByChannel recognizes the hit event between ray and point cloud.

One Issue that is still remaining is that the location of color change does not equal the Ray that is drawn by LineTraceByChannel. Maybe there is something wrong with my get world location or rotation?

This is my updated Blueprint:

[mamls123]

I managed to do it.
I fed the wrong vectors into ApplyColorToFirstPointByRay.
Here is my final Blueprint.