Flotschos

I get where you are coming from and I feel like if you really believe being able to erase your marks is better for you then go for it. And I don't mean that condescending in any way at all (sorry if my comment before made you feel like that)

As far as I understand it is part of what this website tries to teach - being okay with making mistakes because they will be there, they will mess up an entire page and there is nothing you can do about it. Mistakes are inevitable and that's fine.

but for now I believe that thing that did improve most since I started this course was my ability to embrace the suck. I suck, some of my lines are wobbly, not accurate, I miss about 90% of my superimposed lines and don't even get me started on some of my cubes where I put a dot where the line would have converged but I messed it up and the whole cube now is ruined...

...but I learned to accept that and for that I'm kind of glad

So the way I see it the 250 box challenge is not just there to get better at perspective. It's to improve at perspective, line making and being okay with ruining pages and boxes by stupid mistakes

(I'm not as far as you in the course so I could be wrong and maybe after 50 more boxes I'll give up as well though ;) )

However, if your mental health (or your partner's) is suffering just stop doing it! It's clearly not worth that and I don't think any person here judges you for that at all! Also I'm absolutely sure that if you want feedback on your work you can ask people on the discord server even if you draw with a pencil

PS: if you haven't already I would recommend reading the article on this page about using ink: https://drawabox.com/article/ink

First to answer your question:

I think if you want official feedback you unfortunately can't use pencils - but if you want community feedback or have questions that should work. I'm sure people on the discord for example would be willing to help you no matter what medium you use

And I totally understand where you are coming from! I'm currently just at the 250 box challenge and finished 100 boxes but I get so stressed out when I mess things up but now after 100 boxes I feel like I finally understand what this is all about. It's exactly about the fact that yes, things will turn out differently than we picture them because our hands just don't seem to be doing what we want them to. And yes, it's totally frustrating but the more you fail the more you will tolerate that you fail. So if you want to reduce the stress that this is causing you I would recommend you push through it - even if it's tough.

My own experience with this is that my tolerance of my own mistakes got better because I can see how horrible my lines are sometimes. And not only do I tolerate it when I mess up, I expect it to happen - so I'm now less frustrated when it happens but rather excited when it doesn't happen.

But that's just my experience so far. I can't speak for you so you have to decide whether it's too stressful for you to do everything with fineliners or not.

TL;DR

For official feedback you can't use pencils

I would recommend giving it a try if you want to change that mindset and try to learn to care less about those mistakes but it's really up to you