Help issue with cloth collision

[danazoid]

Thanks for the quick reply as always! 

So only the solver can be scaled, this will rigidly scale the space in which the simulation is performed in.

Oh ok that is much clearer. My original interpretation from the manual was the reverse: keep the solver free of translation / rotation / scaling, and apply everything to the cloth objects. 

then the blueprint's collision filtering is the only potential failure point: whats' the collision filtering setup for your cloth particles? (in blueprint edit mode, "category" and "collides with" properties) and for your collider? Are particles allowed to collide against the category your collider is using, and vice-versa?

Just to be sure, I checked the collision filter in the blueprint and all particles are set to collide with everything. They are also in Unity default layer.

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So this is the result after doing that: https://www.youtube.com/watch?v=zeG8hpW09lc
The issue now is that collisions are only occurring with the "large" particles (mesh vertices that are far apart from each other), but I need it to work with the "small" particles (mesh vertices that are very close).

I have tried changing "collision margin" (from 0.02 to 0.05 and 0.005) and the "Obi Fixed Updater" substeps (increase from default 4). The other settings don't seem to be relevant (but I am not sure).
What should I try next?