Modeling

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Box out the entire scene. Then take each element into rough detail first, then finer detail after.

Loop cuts are a fast way to add topology but be wary of adding too much to stay in low poly.

Moving vertices around a little randomly and rotating/scaling loop-cuts helps to give character really fast.

	Block out a large, medium and small stone shape. Apply scale.
	Add a Bevel modifier.
	Add a bit of variations with loop-cuts and randomness.
	Fill in one row.
	Duplicate the row upwards once with `SHIFT` + `D`.
	Repeat as many times as necessary with `SHIFT` + `R` to fill in the height of the wall.
	Randomize each row manually by shifting blocks around.
	Add randomness in object or edit mode.
	Polish manually to avoid ugly joints.

Go into side view and flatten each sides after adding the randomness. They tend to stick out too much and don't look very good in flat shading.

	Create a basic plank.
	Add 2 loop cuts for some variation.
	Duplicate along X or Y to cover the zone. Add a little variation.
	(Optional) Bring variations in length on the end visible to the camera (some sticking in, some sticking out).
	Bevel a few vertices to add notches .
	Randomize a bit & rectify where needed.

Method