A Tale of Two GM Screens

Last year my twins entered middle school. They were really excited for the Dungeon & Dragons club, and when there weren’t enough dungeon masters, I volunteered. I hadn’t played since I was in middle school myself, but I picked it up pretty quickly and it was fun. It looks like we’ll pick it up again this year too. Anyway, after a couple of sessions I decided I needed a game master’s screen, so I set to work designing. Since this was just for us and just for fun, I used DALL-E 3 to generate images of their adventuring party to decorate the front panels (I would not use so-called “AI” art for anything commercial or pseudo-commercial, and feel like I probably made a mistake using it for even this purpose.)

To articulate the panels of the screen, I just used piano-style hinges. But I wanted to do something more interesting for the rear side of the screen. This is where the game master can mount his materials, whether handy rules references, maps, non-player characters statistics, or other elements. Many screens embed a strip of metal across the top of each panel so that sheets of paper can be attached at the top with a magnet. I liked this and did want to use magnets, but I didn’t like the look of embedded metal strips in the wood. I also didn’t want to have a single point of attachment, as I wanted to be able to put magnets anywhere. So I embedded sheets of galvanized steel flashing (for roofing) between layers of 1/8" baltic birch plywood to create a fully magnetic surface in each panel. Without any magnets on it, it looks like this:

There are three layers of plywood: one for the front side, one in the center that is really a frame with windows for the steel sheets, which were Gorilla Glued onto the third layer, where the magnets can go. This worked well enough, though the magnet hold was pretty weak through a 1/8" piece of ply, even with N-52 magnets. There were a few other things that bothered me about the build, and I began to hatch plans for a second attempt.

The second screen is more minimalist in terms of design. The panels are all the same size, with simple wenge and padauk inlays, with a single diamond-shaped frame for artwork in the center panel:

(The artwork is a detail of a print by an artist called Brockprint, which I found on Pinterest.)

The center panel detaches and accepts a standard 4" tile, which could be engraved or painted or fronted by a design printed on photo paper or … Here it is with a ceramic tile from Michaels and a slate coaster:

I didn’t like standard hinges so I made some magnetic hinges using cylindrical magnets mounted on brass rods encased in the central plywood layer.

Finally, I liked the all-over magnetic board for the rear of the first screen but wanted magnets to have a better bond, so I found some 1/16" baltic birch ply. This worked well, though it is more costly (1/16" is both hard to find and pricey). Here’s a photo, with bonus hinge prototypes in the foreground:

(I also prototyped a captured hinge using the same design but inside wooden layers. Unfortunately I didn’t get a pic of this.)

The overall thickness of screen #2 is the same as the first GM screen, at 3/8", but for this one the layering in this one thus goes:

  1. 1/8" birch: Outer surface, with padauk and wenge inlays
  2. 1/8" birch: Magnets for mounting display frame, hinge rods
  3. 1/16" birch: Window for steel inserts
  4. 1/16" birch: Inner surface, with wenge inlays

Here are photos of the layers side by side. On the right you can see that the thinner plies of the 1/16" stock:

Finally, here’s how screen #2 stacks:

You can see the center screen’s unfortunate warping, which I think owes something to the chunk of material taken out for the frame window. The magnets help hold the panels together in the stack, but I probably should have put magnets on the ends of the side panels as well; if I had, the panels would have held together very nicely as a block. Be that as it may, it would be pretty easy to make a carrying harness with some straps around the stack.

I hope this tale of two GM screens is interesting or useful to somebody!

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Nice work.

I wasn’t aware Baltic came in 1/16”, I thought it was standardized to 3mm+.

I’ve seen some aircraft ply in 1/16”, but never Baltic. Cool.

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Imported from Canada: Ultra Thin Craft Birch Plywood — KJP Select Hardwoods

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This looks amazing. I love how you have the back imbedded

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Ah it’s “Baltic”. Not really certified Baltic.

Here’s a guide about Baltic:

That said, I’ve wanted to try 1/16” ply for a while, I wonder if this is similar quality?

https://www.amazon.com/Unfinished-Painting-Pyrography-Engraving-Architectural/dp/B0CMPWM4F3/ref=mp_s_a_1_4

EDIT: ordered, we’re gonna find out! :slight_smile:

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Nice project! Thanks for sharing all the details of the builds. How heavy did the final screen end up being?

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Very cool design! I like the accents on the second one. Nice job.

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Impressive!

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Thanks so much for the write up and photos of this outstanding project. You obviously lean in to your volunteer position.

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I’d like to hear back on what you find with that product. The stuff I used is nice wood, but there are some things to be aware of:

  • No voids our patches to speak of
  • 3-ply, but of course the plies are thinner than the 1-mm of true “Baltic” birch
  • You need to take a very light touch with sanding to avoid sanding through to a lower layer
  • Color was uniformly less warm than the birch I’ve been buying from Ocooch over the years
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I bet it’s basswood if it’s that light and oversands easily.

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Instead of 1/16" ply over the steel layer, did you consider using a sheet of veneer instead? I don’t know how the costs would compare but it might be easier to source veneer.

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very cool.

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@aohnstad Congratulations on a great project, and thanks for sharing your iterations. Most dads don´t go overboard with their children´s hobbies.

I am curious, why do you have regrets about using AI generated images. I think they really pop and give character to your project.

If you mind my asking, how did you transfer the images and achieved such contrast? Were they engraved over masking and spray painted?

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You are definitely all in! I’m sure everyone is loving your efforts!

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Please let us know your thoughts on your order. Two areas say 16” x 12”, but in the description body it says 12” x 12”.

I was going to order some 12” x 12” x 1/16” basswood to make “Save the Date” cards for my niece. If this is truly 16” x 12” a better deal and hopefully a nice quality.

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Could be. It looks very much like birch, there are really no differences in figure or texture from the 1/8" Baltic birch, so I was going under the assumption that it was a different species of birch. I don’t have any known basswood to compare it to, though, so I couldn’t say for sure. I’m very interested to hear how your Amazon order is–it’s a very reasonable price for 1/16" of anything.

I did consider it, but I was worried about two things: how it might look at the edges, as I used a router to round over the edges. That probably would have come out OK, but I was more worried about how well thin veneer would conceal the framing and edges of metal beneath. This SVG shows that framing; the galvanized steel would have been glued to the veneer in the open center of the framing shown.

Inner frame

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Actually, I did find a pic:

IMG_6245 Small

There are cylindrical magnets inside the layered zones that spin freely and work basically like the open hinges in the final screen #2.

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Yes, I could have bought a $10 cardboard DM screen and been done with it, but like a lot of folks here I like the opportunity to design and build when I have a good excuse!

I think we as a society should be taking a neo-Luddite look at this technology, which means mostly rejecting it as something we will better off without. But thanks, it was a lot of effort to generate images that were close to what I wanted and then edit them by hand to get them the rest of the way there.

A fair bit of experimenting went into this, actually. After assembling and finishing each panel (including routing, sanding, and poly), I masked the entire panel, front and back, to ensure it was protected from overspray, then engraved the art using the Glowforge. I then sprayed the engraving using a couple of coats of shellac, from different angles, which sealed all of the exposed wood fibers so that they wouldn’t wick paint later. Then I sprayed multiple coats of flat black paint, again from multiple angles, to ensure good coverage. And then I sprayed either shellac or poly over the paint to protect it (I can’t remember which).

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Great work!!

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