Recolouring Builder sacks

[Strato Incendus]

The Builder sack usually has a small "reflection" on it (e.g. a white spot on an otherwise red bag). This helps to make the sack look somewhat three-dimensional.

However, I'm having trouble making this work consistently for the various recolourings I've made recently.

Sometimes when I do a recolouring of a sprite set, the whole Builder sack just assumes one plain colour without that reflection creating a sort-of "3D" effect.

Sometimes, the Builder sack gets recoloured but the reflection remains the same as for the former colour, which can look very unfitting.

Sometimes, in contrast, only part of the Builder sack actually gets recoloured while the rest remains red.

I figured out that it probably has something to do with what colour you choose for "MASK", but that alone doesn't seem to be enough.

I also tried to look at the L2 recolourings for guidance, since the Builder sacks for all of those look decent - and it can't have anything to do with the base colour of the Builder sack or the reflection being a different one, because all of those sprites merely recolour the default sprites.

So which other colour do I have to adapt in a theme.nxtm file in order for the Builder sack not to look weird? The MINIMAP? The ONE_WAYS? The BACKGROUND? Or the PICKUP parameters?

[namida]

From memory, the color used by those pixels on the builder pack is also used by some part of the floater / glider sprite, so try experimenting with the colors for those.