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Correct use of a
Horizon line: center of the picture plane, perfectly
straight.

No horizon line used

Horizon line used,
but not centered, not straight.

Horizon line used,
centered, but not straight.

Correct use of a Horizon
line: center of the picture plane, perfectly straight.

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Correct use of the
vanishing point: point centered in the middle of the
horizon line, all ascending lines converge at the point.

No vanishing point
used.

Vanishing point used,
but not centered on the horizon line, not used for all
volumes.

Vanishing point used,
centered on the line and used for the majority, but
not all of the volumes.

Correct use of the
vanishing point: point centered in the middle of the
horizon line, all ascending lines from all volumes converge
at the point.

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Perfectly rendered
squares: the use of the ruler to produce squares with
equal sized sides.

Squares are not squares,
sides are not equal.

1/4 of the attempted
squares are squares.

1/2 to 3/4 of the attempted
squares are squares.

All squares are rendered
correctly.

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Erasing of exterior
lines, and overlapping: Simulated depth is created with
all exterior lines erased and overlapping correctly
used.

All exterior lines
still visible in the picture, no overlapping.

Some exterior lines
still visible, very little overlapping.

A few exterior lines
still visible, few examples of overlapping.

Erasing of exterior
lines, and overlapping: Simulated depth is created with
all exterior lines erased and overlapping correctly
used.

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Total>

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