How do i make a cloak for my character that is simulated and doesnt take the fps to far down. Should it be made in godot directly or is it better to do it in something like blender and animate it and play a loop?
The only out-of-the-box solution in Godot is the SoftBody3D node which allows you to simulate soft bodies like cloth or jelly.
I haven’t messed around with it myself but the node seems to achieve what you’re looking for. It even has a Simulation Precision parameter that lets you tweak for quality or performance.
Whether you should use this node or an animation is dependent on the use case; simulating cloth on a single player is obviously less demanding than having a large group of enemies with simulated cloth.
Sidenote: Performance is always important but aiming for optimal performance can be a productivity blocker. Making the game is, arguably, more important than the slight performance boost gained by your refusal to lower your performance expectations. Do the best you can with what you know, and if you come across a system that exhibits particularly egregious performance, then you can worry about performance.