Frame Component Oddity?

i think this is because the inner and outer are tied together with the 'frame width' slider. therefore, you've got a sort of internal blend going on between the two, with the 'outer' being the dominant, solid and the 'inner' being blended over the other. so, it's like having layers. the 'outer' is the 'bottom' layer and the 'inner' is the 'top' layer. when you move the alpha you are simply masking the inner, thus allowing the 'outer' to show completely.

if you strip down the 'outer' to alpha, you'll see that the 'inner' doesnt go all the way over to the other side, where the 'outer' does.

whether it's intentional or not, i dont know.

On a sidenote, the Tiles, Bricks and Pavements components exhibit a similar blending behaviour as you described for the Frame component, namely the 'Mortar' being the bottom layer that determines the final alpha. Seems weird to me, but it just might be intentional after all.

Anyway, I don't care too much about the alpha blending in the Tiles, Bricks and Pavement components, but in the case of the Frame component the issue becomes important. Since you can 'abuse' this component as a gradient tool for generating pyramidical and circular gradients, maybe the RGBA interpolation behaviour should be changed to work more like in a Profile Gradient component?

Precisely!