Operating system: Windows 8.1, 64 Bit
Graphics card: AMD Radeon HD 7600M Series, Intel(R) HD Graphics 4000
Broken: 2.80Beta, 009dbc2bc9fb, Branch: blender2.7, 2019-04-09,
Worked: Blender 2.79, 2017-09-11, 5bd8ac9
Lennard-Jones-Field: Self Effect only works, if you additionally add a second Lennard-Jones-Field to the emitter itself which can
be removed again immediately. Self Effect also works without an additional force field, if you create the file in Blender 2.79 and
import it to Blender 2.8Beta or create it in Blender 2.8Beta and reload the saved file.
Exact steps for others to reproduce the error:
Create a plane with scale factor 4 and with particle emission from faces (grid, resolution 10, emission start and end on frame 1,
lifetime 250), normal velocity and gravity field weight set to zero, render particle size (scale) set to 1 (and for better
visibility display paricle size set to 0.5 and Color "velocity" ). Add a Lennard-Jones-Field with Self Effect to the particle
system and start the animation. Nothing happens.