6:45 AM, Wednesday January 13th 2021
These are already looking much better. Just don't forget that the angles between of initial Y should all be bigger than 90 degrees. Otherwise there will be distortion (like your box #6). There are two boxes with an angle slightly smaller than 90 degrees.
Also, good job on drawing those boxes bigger! :)
For the next boxes I'll ask you to try more different angles. Try to use the Y randomizer that I had mentioned on my critique. And try to make the lines converge just a bit more. Your lines are either almost parallel or actually diverging a little.
Keep up the good job!
Next Steps:
More 15 boxes, this time having different angles and make them converge a bit more.