This XXXX artist told me my YYYY softwares no good for celshading. Is it true?
If your software can simplify the shading on the surfaces and trace the geometry with clean “ink” lines, it’s enough for celshading. Maybe it can’t easily recreate other traditional-media styles, like Bill Plympton’s work, but it’ll be good enough for recreating the look of cel animation. Gain a clear understanding of your celshader tools, then focus on improving your modeling and drawing skills. Don’t listen to folks who claim that the right celshader software can guarantee good drawings with a minimum of effort. The most advanced celshader tools out there can disguise awful work to look hand-drawn, but it will never make bad work look like good drawings. Good work always takes work. Otherwise, everyone would have Lord of the Rings-quality work on their demo reels.