Light guide for a motor vehicle illumination device for improving light homogeneity

A light guide () for an illuminating device, the illuminating device adapted for vehicle exteriors and including an array of light sources (), the light guide () including: a guide body () extending along a horizontal axis (X-X); and a plurality of guide fingers () intended to guide the light emitted by the array of light sources () and extending from the guide body () in such a way that they are aligned along the horizontal axis (X-X), each guide finger () extending between a light input end (I) receiving at least part of the light emitted by the light sources () and a light output end (O), adjacent guide fingers () being joined by a junction () integral with each of the adjacent guide fingers (), and at least one of the junctions () includes a protrusion () extending towards the light input ends (I).