Building a Diorama - Part #3 - Cutting the Foam-Core Board

I built my diorama on a half sheet foam core board, 15"x20", but have found it a bit small and limiting in photo angles, so I will be giving instructions on a full 20"x30" base.  This will require (3) boards, 3/16"x20"x30", one for the base, one for the profile boards and one for miscellaneous pieces.

Picture #1 The three foam core BOARDS

The Base requires no cutting, only drawing two locating lines for the #2 and #3 profile boards  The #1 and #4 profiles boards are simply located to the edge of the base board.  The numbered locations will be used after each profile board is altered slightly to produce a path or roadway across the diorama.

Drawing #2  Foam core BASE BOARD

The four Profile Boards are cut from the second sheet of foam-core.  The actual shape of the sloping profile will be determined later  Use a steel  rule to guide the knife blade and remember to keep the knife  perpendicular to the board and use several light strokes so as not to crush the foam core.  With the profile boards all in the same orientation number the boards #1 through #4.

Drawing #3  Foam core PROFILE BOARDS

The third board is used for Miscellaneous pieces, 2"x30" Front Edge Board, 4"x30" Rear Edge Board, and 4"x4" Gussets.  Save the remaining board material for future needs as required.

Drawing #4  Foam Core MISCELLANEOUS PIECES

The major cutting is now complete.  In Part #4 we will locate the path or roadway.