Game Dev Journey

We can create an obstacle which falls from the sky.

Create a new scene with Rigidbody3D as root

Rename it to Dropper

Add MeshInstance3D, CollisionShape3D and Timer as children

For the MeshInstance add a new BoxMesh

Add Material and change the Albedo

Select the CollisionShape3D

Add a new BoxShape3D

Match the dimensions of the MeshInstance

Set the Timer to Autostart

Select the Dropper node

Set the collision layers and masks

Add a script to the Dropper node

Add references to the Timer and MeshInstance

Add a variable to track if it has been hit

In the ready function

Freeze physics so it doesn't move initially

Hide the obstacle

Connect the timeout signal of the timer

Connect the body entered signal of the rigidbody

In the timeout function

Show the dropper

Unfreeze it

In the body entered function

If the body is the player

And the Dropper has not already been hit

Call the change color function

Create the change color function

If not already hit

Duplicate the material

Set material color to red

Override the current material

Now you can instance some droppers in the main obstacle course scene

Walls

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