Pyramid illusion

  • Advertise with us
Blog entry by BertFlores58 posted 01-11-2011 08:19 AM 8564 reads 0 times favorited 6 comments Add to Favorites Watch

I have to reduce my time in dealing with geometrical design last holiday seasons due to some domestic appointments and household projects. However, my mind is pre-occupied on to continue different design concepts using a rhumboid. I think it is time to recover from the LONG GAPS and so here I am back again to what I started. This time, I do design and do it in flesh as soon as I have the chance.

Pyramid came up when I accidentally cut a rhumboid the other way around. Instead of a 60 degree rhumboid, I was able to produce a longitudinally cut with two isosceles triangle. We may say it is longitudinal cut rather than crosswise (creates equilateral triangle)

So I figured out that I can make like this

Then on the making I have following steps:

Phase I – Getting the right wood and colors… estimate the availability (Better to have more than short) – depends on the wood availability – 5 days (some were glued to form a block) It takes a long time to gather those wood cuts leftovers and scraps that are of good quality and still can be used.

Phase II – Cutting strips of wood to triangular at 45 degree (same like a prism) – Half day using portatable circular saw and miter.

You will observe that I normally use a handsaw when the stock is less than two inches in width. It is two dangerous to cut it using portable saw or miter saw… due to its limited clamping edges. Sometimes I glue other stuff just to widen the clamping edges.

Phase III – Glueing pair of prismatic wood to form a square rod. (Takes times because you need to choose the right color of wood.) – overnight for drying.. good time becase I can do it after my office work.

Phase IV – Squaring and final planing for the square rods… (I normally use hand plane so I can control the correctness of the 45 degree corner to corner joint) HARDEST PART OF THE JOB. HAVE TO REJECT A LOT WHICH DOES NOT PASS THROUGH MY QUALITY. THIS WILL ALSO GIVE THE GREAT ACCURACY. Sometimes, I over plane woodstock making it undersize.. I dont throw it but regroup it for the next project that will be using smaller size.

Phase V – Sawing to thickness. I use a miter saw to cut to size (endgrain pieces) The setting of the miter saw is compounded. The vertical adjustment setting is 45 degree and the horizontal adjustment is set to 35 degree.

There is a very limited chance of correcting it to size.. I tried planing, it is difficult to make a perfect plan using manual planing… THE BEST ACTION is to RENEW THE PIECE…. I have learned that on this stage you have to pre-assemble the correct pieces and if there is one or two that is not accurately cut… it is better to replace it because there is no chance to repair when glued already.

Phase VI – GLUE UP for the pieces. The messy part… I did not take pictures at this stage as my hand is full of glue… LOL. This is the most thrilling part. Like a jigsaw puzzle.. you have to join the pieces. WHAT IS IMPORTANT in this aspect… GLUING BEVEL PIECES IS QUITE DIFFICULT THAN STRAIGHT PIECES. The joint slides up when you push sideways.. THE ADVANTAGE… due to the bevel…. THE GLUE STAYS IN PLACE and does not drain compared to vertical or straight joints. Another advantage…. the gaps is hardly seen in any angle and there is more glue spaces creating a greater strength.

Phase VII – Sanding and FINAL FINISH…..


AND THE FLIPSIDE (look at the difference) THE CRAZY ILLUSION…

What happened is that each vertical row is inverted joined creating a 90 degree offset at the flipside…
Amazing and again accidentally discovered… Can you figure out?.....

I think I have to continue next time with the sides… My plan is to make a jewelry box (rectangular out of it). The side is planned to be like this….


-- Bert

6 comments so far

View lanwater's profile


3111 posts in 2930 days

#1 posted 01-11-2011 08:31 AM

Very creative pattern. it does look like pyramid!

-- Abbas, Castro Valley, CA

View degoose's profile


7233 posts in 3351 days

#2 posted 01-11-2011 11:12 AM

Another master at work… super design Bert…

-- Don't drink and use power tools @

View BritBoxmaker's profile


4611 posts in 3032 days

#3 posted 01-11-2011 09:35 PM

Novel and very interesting pattern, Bert.

Given the difference between front and back I wouldn’t sand the face side too much though.

Good post

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

View BertFlores58's profile


1698 posts in 2918 days

#4 posted 01-11-2011 11:13 PM

Thanks to all. Actually it is fun to do these things.
Martyn, I agree that sanding too much will not emphasize the mitered joint of its pieces like what I have done in the hexabox. However, due to uneven glue up (some pieces protruding) I have to sand till the level is reached. It is really good to have both of you and Larry making giving me the inspiration in dealing with this.
Larry, Next oppurtunity is the most difficult design… The Parabolic…
By the way Larry, been reading about flood.. It is good that you were not hardly hit in your place. Take care and stay dry.

God bless and cheers,

-- Bert

View Sheila Landry (scrollgirl)'s profile

Sheila Landry (scrollgirl)

9228 posts in 2916 days

#5 posted 01-12-2011 12:26 AM

Hi, Bert:
I responded earlier and it must have not posted. :(

Anyway, I want to tell you how much I like this design. It is really awesome. I love this type of woodworking and it is great to see the different ways that a design such as this is accomplished. Great post!


-- Designer/Artist/Teacher. Owner of Sheila Landry Designs ( Scroll saw, wood working and painting patterns and surfaces. "Knowledge is Power"

View BertFlores58's profile


1698 posts in 2918 days

#6 posted 01-12-2011 12:41 AM

Thanks Sheila,
You are one of the inspiration I got (also Mike “Cosmo”) to incorporate in designing this small endgrain pieces. I like to make holes on those blocks prior final board gluing. I just could not find how to do it. Probably drilling process or shaping it before making a longer rectangular block. Hard to explain eh… but let me realize it by using some shape moulding…

Same here, I want to share the idea and concept where maybe some will be interested. If you want to have some of the sketchup design just pm me your email address so I can attached it to e-mail.

Regards and God be with us all.

-- Bert

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics