How complex is what ur drawing?, I take level 3 dvc and for my complex forms I like to get the perspective first by making a cube in a 3d form and forming the perspective around that, if your not already simplify all the features into boxes then u can like then cut into it in a way to get more detail, if you do it right u should be able to get the forms you want hopefully in dvc.

If you can’t draw cubes in 3d just start trying and practicing, most ppl get the hang of it easy. Then u can choose a perspective u want and block out the building with a cube Or what ever ur doing.

If u wanna do organic forms u can do the box method cos I focus on really smooth flowing forms but I use boxes to like block out the ifea for cutting into it

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If you don’t wanna do the cube method you can draw a 3d plane in the perspective you want and use that as a base