- ret[highlight * 3 + i] = ret[background * 3 + i] * 1.2F;
- ret[lowlight * 3 + i] = ret[background * 3 + i] * 0.8F;
+ if (highlight >= 0)
+ ret[highlight * 3 + i] = ret[background * 3 + i] * 1.2F;
+ if (lowlight >= 0)
+ ret[lowlight * 3 + i] = ret[background * 3 + i] * 0.8F;