Sunday, May 28, 2017

Applied One Point Perspective


Noble Shepherd, Graphite on Paper, 22 x 15 inches.
This drawing displays a shepherd with a Desert bighorn sheep standing before Mayan architecture based on a building at Chichen Itza, Yucatan.  He is grounded on a Mexican style rug ready to ascend a staircase. I used one point perspective to create an environment in this drawing.  I changed the animal from the Oryx gazelle on the bottom image to the final Desert bighorn sheep because while Oryx gazelles look interesting, they are native to Africa and Desert bighorn sheep can be found in Mexico.  Many are now hunted for their curved horns yet this shepherd stands by his sheep in protection.

A summary of the general process I followed for creating the ground grid and objects in the scene is described in this post.

After completing the block-in of the model I began the ground grid by drawing a square around the model's feet.  To do this I first established a horizon line by determining how high my eye level reached on the height of the model from my point of view.  Then I established the vanishing point along the horizon line by determining my position from left to right in relation to the model from my point of view.  

I drew the square around the model's feet by first establishing a horizontal line for the front of the box and then drew lines from each end of the front of the box to the vanishing point, labeled VP.  To determine how far to place the back of the box I drew a diagonal line from the front left point of the box to a point of distance along the horizon line, not seen in the picture because it is off the page.  Generally, the point of distance is about 2 to 3 times the height of the model to create perspective without distortion.  

I was so close to the model while making this drawing that I was tilting my head up towards the portrait and down towards the feet to see the entire model. So when I used the measurement for the distance that  I actually was away from the model to create the box it resulted in a distortion of the box appearing to tilt too far up towards the viewer's eye, as if the box was not resting under the model's feet but instead tipping forward.  I settled on using a further point of distance to make the box appear tilted further away and appear less distorted.  I checked the box to see if I could believe that it was tilted far enough away for the model's feet to stand on it or if it seemed that the model would fall off, thinking of the box as if it was a surfboard.  I adjusted how far to place the back of the box accordingly for the perspective to appear more believable.  
 Here is an example of the first stage of drawing the box.  I used a 90 degree triangle to create horizontal and vertical lines.  For the drawing of the model I used a level to establish a vertical line to base other lines off of.  In this example, the point of distance is labeled, D, along the horizon line.  The further to the right the point of distance goes the more the line for the back of the box comes closer to the ground line and makes the box appear to tip further away.
 In creating the grid along the ground in my drawing I extended the original box by using the point of distance.  To create each new box I connected a line from the back left point of the box to the point of distance and found where this diagonal met the line going back to the vanishing point.  Then I just drew a horizontal line to this point to create the back of a new square.  I repeated this process for each new square going back in space.

 To create additional tiles towards the right or left I just used the unit of measurement along the base line of the front of the box and slid it over to the right. I extended a line from the right end of the front of this new square to the vanishing point.  Then I extended the horizontal lines from the original path of tiles so they cut across this new path of tiles.  I repeated this process for each new path of tiles to include along the ground.
 To create objects on top of this grid one can raise the height from the ground line as far as needed and extend lines back to the vanishing point as far as needed to establish the depth of objects.  The units of the tiles on the ground can help in measuring the dimensions of objects.

  I used the measurements of the tiles along the ground to assist in establishing the dimensions of a rug.

I used graphing paper to determine where important points of the design would meet points along the square tiles for the rug.

I placed many point of the design onto the rug initially and continued some aspects of the design more freely by roughly following the tilts initially established in the design.

To add the Desert bighorn sheep I made a sketch at The Academy of Natural Sciences to use as a reference and transferred the image to my drawing at a larger scale.

Thanks to all the help in learning about perspective from Anthony Baus in this drawing and in his perspective class at Grand Central Atelier.  I also utilized concepts of one point perspective described in G.A Storey's book the Theory and Practice of Perspective.

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