jensroda in the post "What could i have done wrong?"
2022-06-14 07:48
The smaller you draw, the less room you have to line everything up. Based on the picture you shared of the full image, I can tell by the size of the pencil that you are drawing the whole exercise way too small. You can try turning a whole piece of paper on its side and try just one set of boxes on that page and the extra room will help line things up.
At the size you were drawing, just the width of one pencil line can throw off the spacing of your guidelines and also make it impossible to find your vanishing point to line up the rest of the guidelines.
As you can see by looking at your vanishing points, they have turned into dark triangles of marks that is impossible to line up with.
jensroda in the post "What could i have done wrong?"
2022-06-14 07:32
I can see that your lines arent actually converging at the vanishing points. Look at the right side of the image, the spacing is all wonky. Try using smaller dots for your vanishing points, ideally they would be one dimensional.
Edit:
Upon seeing the full drawing in another reply, I can see that you are drawing way too small, which amplifies inaccuracies in precision line work like this, you are using too big vanishing points (likely because of how small you are drawing) and you arent using a square to draw vertical lines of 90 degrees. In two point perspective, you want perfectly vertical edges.
jensroda in the post "What could i have done wrong?"
2022-06-14 07:52
Just remember that every try brings you closer to your goal and you will be fine :)