Does STG plan to use Apple's Metal API?

[JaytB]

What metal API?

Do you mean Swift?

Metal and Swift are 2 different things.

Metal is essentially a replacement for OpenGL 3.x and allows for much less CPU overhead. It allows programmers to code closer to 'the metal' and so allowing them to get more out of the GPU's than was previously possible.

The current few games that support metal look very promising for such an early state. A ton more detail is generally added, making a serious difference in overall look.