Why opacity mask doesnt show in game mode

[joaquin270 (Joaquin MB)]

Hello everyone, I hope you are doing well. I have a question about a material I set up following this tutorial: tutorial_link. When trying to enter the game mode in Unreal 5.1, the opacity mask is not visible. What could be wrong or what do I need to enable to visualize that effect? If you have any answers, I would appreciate it. Thank you!
Mi material settings:

[ClockworkOcean]

I’m wondering if it’s your scalibility? Can you try on high or epic?

[joaquin270 (Joaquin MB)]

Yes, but doesn’t show any effect.

I saw somewhere in the forums that it could be due to nanite on meshes, that it doesn’t like opacity mask… but I’m literally using the basic UE cube, so I don’t know what it could be.

[joaquin270 (Joaquin MB)]

I loaded the project in UE5.2 and it still doesn’t show the opacity mask effect…

[ClockworkOcean]

Bizarre… No idea right now

[3dRaven]

holeMat.zip (52.4 KB)

Did you set your scale & falloff in your material instance?
My example works in editor & game mode in 5.2

Did you setup the blueprint actor correctly to pass in information to the material collection?

[joaquin270 (Joaquin MB)]

Thank you Raven!!, for sharing an example. It seems to be a problem in my game mode because I executed your project and still can’t see the opacity mask. I don’t know what it could be, honestly

[3dRaven]

Ok so I did a test and it works in game mode, but I noticed that once I packed the project for windows it no longer shows up. So I’m guessing something needs to be set in the packing process, perhaps a forcefull inclusion of the asset or shader.

[3dRaven]

OK Got it working in packed!!
You need to call the same function from contruction in on begin play!

In packed (added box collision for ref)

[joaquin270 (Joaquin MB)]

Nice one Raven!!!, Now it works, it was exactly as you said, we had to repeat the definition of the construction script in begin play.