Particles - fix emission from faces / verts

[kaiwas]

Is it possible to realize the work of particles (hair) not through volume, but in other ways?
When the "volume" of a particle is distributed along a rectangle, even if the shape of the parent is complex.

Similarly, when the particles are activated on the GPU, the particles flicker or even fail under the parent. I did not find Particles on the GPU in the material configuration, although it was previously.

blendfile
04-test2-trava.zip

Thank you for your work!