Thanks for the feedback — you're right that the cube keyword is legacy behavior and effectively creates a 2D square rather than a true cube that scales with token size.
The more flexible and recommended approach is to use the 3drect shape:
This will create an aura that properly covers just the affected token regardless of its size.Code:AURA: 1 all, 3drect|10|0|0|0;
The main current limitation is that 3drect shapes aren't yet supported by AoE Effects' built-in aura visualizer, so you won't get a visible border or the ability to apply a custom aura image. However, for a difficult terrain effect, the mechanical coverage is what matters most, so this should work well without needing the visual elements.
Appreciate you taking the time to point it out SilentRuin!

