message: BF: ColorDef.lerp() no longer operates in-place - breaks skybox.
diff: @@ -324,7 +324,7 @@ export class DisplayStyle3dState extends DisplayStyleState {
  frac = Math.pow(frac, env.sky.skyExponent);
  }
  - color1.lerp(color2, frac);
  + color1.lerp(color2, frac, color1);
  color1.setAlpha(color1.getAlpha() + frac * (color2.getAlpha() - color1.getAlpha()));
  buffer[currentBufferIdx] = color1.colors.r;
  buffer[currentBufferIdx + 1] = color1.colors.g;
  