A few nights ago I was having dinner in a nice Italian restaurant with a neo-classic decoration. A few walls had shell niches that exhibited wonderful sculptures. These niches were exedras - a semicircular recess inside the wall.The word Niche derives from the Latin nidus or nest. The Italian nicchio for a sea-shell may also be involved, as the traditional decoration for the top of a niche is a scallop shell. I recall a nice piece of art of Filippo Lippi - Madonna - where the trompe-l'oeil niche frames her.
I took a picture with my phone with a very bad light just to remember the image.
I thought it could be a very good example to apply the Extrude tools plugin developed by TGI. After registering you can download them from http://forums.sketchucation.com/viewtopic.php?p=217663#p217663 .
You will also need another plugin called Weld from Smustard that can be downloaded from http://www.smustard.com/script/Weld . All these plugins are free.
Once you have downloaded both tools follow the instructions how to install them.
These tools are a must-to-have for interior designers.
After analyzing the geometry I decided that the option to use was "Extrude Edges by Rails." I had organic forms with double curvature, the front arcs and two curved paths converging at the rear of the exedra.
I followed this procedure:
1. I drew a 12 segments half-circle in the red-green plane. I drew another half-circle in the red-blue plane with the same properties that would be the opening of the niche. I made a third half-circle with an offset at 2” to get a face to work on and to use it in a later step to finish the overall niche.
To create a fast rendering I applied gold color inside the niche. I imported an alpha-transparent background image “as image” and applied it on a vertical face. I created an Always Face Camera component. I edited the component and erase the vertical face keeping only the image. I placed the Rodin sculpture inside the niche. I turned the edges and profiles off,
I used Pull/Push to create the lower part of the niche and Line to complete missing faces.