Pistons through fluid?
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A concept builder in layman terms:
You can push piston through a waterfall, but cannot push piston through water contained in a immobile structure.
Even if you set the PSTN push parts' limit(how many particles it can move) very high, it either stops by a wall(true wall type) or breaks the wall(if the wall is composed of particles).
PSTN+FRME will push everything in front of them straight.
The main problem here is that PSTN push the water forward, but the water has nowhere to go.
In reality, if you press your hand into water, the water has higher pressure and will usually flow around your fingers to go up.
Then your hand can move further to the bottom with less water particles blocking you.
In TPT, the water don't flow around the piston when pushed by piston, they simply stay there as there is no such physic law as water pressure and PSTN don't change velocity/pressure.
Solution:
Create the flow yourself.
The flow needed is to make the water flow around you, or at least, clear the water in front of PSTN.
The followings are a list of methods others and I have tried,
(higher = easier to make)
1. use a sharp FRME so water will go around it
[Only works if the FRME is moving in the opposite direction of where water want to go. For example, FRME is going up and water is pulled downwards by gravity, a ^ shaped FRME lets the water flow away naturally]
2. use PRTI in front of FRME and PRTO elsewhere to drain water that dares to block the PSTN away, without deleting the water particles.
3. use GPMP in the FRME to generate a gravity forcefield to push away water.
4. use CONV(ctype: EMBR) or INWR+CRAY(ctype: SPRK) to delete all water particles that dare to block the PSTN.
5. use PIPE to move all water particles in front of the FRME to somewhere else.
PS: using SPNG to absorb water does not work, the absorption rate is so slow.
If you know subframe, there are more solutions that works in even more demanding environment.
