First thanks a lot to share these cool particule effects !
I've experiment some crashes without so much error log eitheir in editor clicking on cube_o ,cube and demo_p nodes or running the appli with "Socket close .. " error message. => So i suppress this nodes, and it's OK.
My GPU is quite old ... NV GeForce GT 630M, but i tried on more recent hw with NV Quatro and still some of the previous nodes crash the execution. What could be the issues ? Is it openGL drivers that are buggy ? How work ES 3.0 emulation on PC based on standard OpenGL, is it included in Godot ?