Pencil+ works without random/constant crash like illustrate Illustrate is a render engine to render toon line and also feature a cell shading material, but it can also use a secondary alternate render engine to have advanced shader. Psoft Pencil+ is actually exactly the same thing as Cebas Finaltoon. It works exactly the same way. It is an effect for toon line and feature also his own cell shading material. Those 2 things(pencil+ and finaltoon) are basically clones of each other. Whereas illustrate can render customisable toon lines with any other alternate render engine(when it works), Pencil+ and Finaltoon work only with Scanline render and Final render to my knowledge.