Techniques have a reason behind them for using them of not using them.
Here are three for you to consider for not using yours.
You are using to much pressure, i appreciate its a picture of motion captured so can be interpretted in many ways, but look at the finger tips of the thumb and ring finger. They are 'white', that shows the presence of pressure being used, whether that is a constant pressure i cannot say because the picture shows a moment of use...not the full use.
But in other plucking techniques the pressure would not be there, certainly not pressent in a floating thumb, or a fixed thumb using the correct technique
Point 2. Look at the ring finger joint, it is bent in in to the joint, (hyperextended) over time this will cause problems of hyper-mobility, you may even have a form of it which is why you use this technique?
I know the joint has pressure because the finger tip is white, (looks like the joint is white as well) so that is un-needed pressure/tension on that joint.
A good technique has no sustained pressure and certainly should not show on the areas you are producing it at.
Point 3. The hand lies across the strings, not parallel to them.
In some way your wrist is holdingthe hand to allow the ring finger to sit on the string along with the thumb and produce the pressure that may be the source of the 'whitening'. It may be the forearm pushing the hand, therefore the fingers, on to the instrument, this means that the wrist will be overly bent to bring the hand back to the bass and allow the fingers to access the strings.
If so then you will have excess pressure on the wrist as well, again an un-nessesary and un-wanted thing in your long term playing.
The reason we have correct techniques is because certain critera are present, we also look for un-wanted criteria, to allow a better over all use for the body.
Sometimes a change may feel like going backwards, but it depends on how you view your over all playing, but it does improve once the player develops the new use.
As i said, this is based on what the picture shows, not the action of your technique in motion....that may show another story, but based on what i have said, just check out your technique against those points.