public Vector4 GetAdditiveColor(int instanceId)
{
float x = additiveColorData[instanceId * 4];
float y = additiveColorData[instanceId * 4 + 1];
float z = additiveColorData[instanceId * 4 + 2];
float w = additiveColorData[instanceId * 4 + 3];
return new Vector4(x, y, z, w);
}