Paper Progression Kit

Paper Progression Kit is a set of 20 progression and reward components drawn in the flat style, where there are no outlines and no shading at all. It contains four skill tree node states, straight, elbow and branch tree links in two states, a locked and an unlocked mastery node, empty, half and full rating stars, a level badge, an experience bar with tier ticks, an experience ring and an ability cooldown ring.

Progression screens are where state matters most and where colour is least reliable: a skill tree is already covered in ability art in every hue, so a node whose state is only a border colour is unreadable the moment it has an icon in it.

Depth comes only from a layered soft shadow — three stacked passes rather than a blur filter, because some SVG rasterisers scale a blur wrongly and the 4x PNG comes out as a smear. Everything else is one solid colour.

Inside that style this is the Paper reading of it: a light interface on a warm paper palette with rust red accents, built around a single bordered frame, fully rounded pill buttons at 140x44, banded bars divided into 10 segments, and outlined icons on a 24px grid. Those measurements are why two families can share an art style without being interchangeable: the style decides how an edge is drawn, the numbers decide what the interface is for.

The tree links are the part that was missing for longest: a skill tree is not made of nodes but of the relationship between them, and without a connector drawn in the same style the developer ends up drawing their own line that does not match. Straight, elbow and branch cover a grid layout, and each comes dim and active — the active path is not just accent-coloured but thicker, because a skill screen is already full of coloured icons. The locked node is hatched, the maxed node carries four corner ticks, and the available node is simply the plain face — three states told by texture and count rather than by hue. The two rings share one geometry and differ only in fill direction and colour, so they line up when stacked.

Every sprite ships as an editable SVG and as transparent PNG at 1x, 2x and 4x, so you can drop the PNGs straight into an engine or open the vector and change a colour. Built to the same measurements as the rest of the Paper family, which means this kit and the Paper panel kit line up without either being resized. A good fit for minimal and mobile interfaces.

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