No problem :),
you can also use scene.axisUp();
It is also possible to construct a float3 that will be automatically swizzled depending on the pack's axis system by using :
Axis1 = float3suf(0, 1, 0);
float3suf meaning float3 side up forward, and it will be automatically swizzled depending on the axis system.
It's useful to create particle packs compatible across various game engines (UE4/Unity) that don't have the same axis system.