Looking for better solution to collect texture pixel color at collision point?

[Rhadley]

The Goal: To collect the color of the (closest?) pixel at the intersection point on a collide-able mesh…to use in a Niagara system to color debris mesh. UE5 Blueprint.

This is what I’m using and it works BUT we are seeing a heavy drop in FPS when using. We are pretty sure it’s the capture pixel and read pixel that cause the drops.

Are there better / more efficient methods to collect this this collision color information?

Video example:

[3dRaven]

Reading texture color data using UV values

Here is an solution: [303902-gettingalphavialinetrace.png] Notice you should have “Trace Complex” and “Support UV From Hit Result” check-boxes turned ON both! “Trace Complex” check box is in your Line Trace node. “Support UV From Hit Result” you can find in: Setting>Physics>Optimization>Support UV From Hit Result.

[Rhadley]

Oh look at that! Let me try this today! Ty for the approach.

[Rhadley]

Update: Using Gbuffer in a custom Niagara module in GPU particles has proved the best solution for now. Can’t see a performance difference (yet).

[Nonlin]

Can you go into more detail with that solution?