Dr Matt Dempsey's Avatar

Dr Matt Dempsey

@sketchy-raptor.bsky.social

πŸ¦• Musculoskeletal biologist & vertebrate palaeontologist πŸ›οΈ PhD'd with the University of Liverpool and the Natural History Museum, London πŸŽ“ University of Manchester graduate πŸ–ŠοΈ Sci-illustrator πŸŽ₯ Likes movies https://www.mattdempseydinosaurs.com

3,694 Followers  |  144 Following  |  488 Posts  |  Joined: 24.07.2023  |  2.016

Latest posts by sketchy-raptor.bsky.social on Bluesky

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Matt Dempsey’s profile Matt uses Letterboxd to share film reviews and lists. 59 films watched. Favorites: Jurassic Park (1993), The Empire Strikes Back (1980), The Good, the Bad and the Ugly (1966), The Batman (2022). Bio: ...

letterboxd.com/sketchyrapto...

08.10.2025 22:54 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Today's cinema trips!

I might raise the Avatar 2 rating to 5 just because of how blown away I was by the artistry of it all.

It was actually my first viewing, I missed the original release, and figured that TV would be an inherently lesser experience, so I decided to wait.

08.10.2025 22:54 β€” πŸ‘ 5    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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Watching Snowpiercer, spotted John Sibbick's Archaeopteryx.

06.10.2025 00:20 β€” πŸ‘ 35    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

PA12, via multijet fusion!

It's a really good detail-durability balance.

01.10.2025 19:47 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

A dumb analogy - you wouldn't look at a freshly ironed shirt and conclude that fabric doesn't crease.

20.09.2025 11:17 β€” πŸ‘ 16    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

You also cannot rule out that decomposition processes unrelated to planar compression have also changed what you're looking at.

These fossils are still very informative, but you wouldn't reconstruct an animal's *exact* life appearance and functional morphology based on roadkill.

20.09.2025 11:17 β€” πŸ‘ 17    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

You just can't rule out that said compression has considerably warped the soft tissue outline in these cases.

And even if you could, in many cases you're still not dealing with clean projection of the body shape onto a perfect, standardised anatomical plane.

20.09.2025 11:17 β€” πŸ‘ 14    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

I think the allure of soft tissue has made people too comfortable with taking slab fossils at face value. It's not like they aren't useful at all for inferring life appearance, but you have to consider that these are non-rigid 3D objects that have been compressed into a 2D plane.

20.09.2025 11:17 β€” πŸ‘ 33    πŸ” 3    πŸ’¬ 2    πŸ“Œ 1

I really ought to go back and remaster the cover image I made for the first chapter so that it's more consistent with the others...

12.09.2025 13:01 β€” πŸ‘ 7    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

These three chapters were the ones thay we always planned to publish more or less in the same form that they took in the thesis itself, so having these out in the world is a bit of a personal milestone.

12.09.2025 13:01 β€” πŸ‘ 7    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0
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As of this week, three out of the four research chapters from my PhD have been published. Data from the fourth is currently being adapted for an in-progress paper.

royalsocietypublishing.org/.../10.../rs...
royalsocietypublishing.org/doi/10.1098/...
onlinelibrary.wiley.com/doi/10.1111/...

12.09.2025 13:01 β€” πŸ‘ 29    πŸ” 4    πŸ’¬ 1    πŸ“Œ 0

Yes. A bent-limb stance causes the bones to be loaded in different ways to an upright stance. To deal with this, the limb bones of sprawling or crouched animals have different dimensions that wouldn't be directly comparable to animals with upright stances, even if their centres of mass were similar.

12.09.2025 01:23 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

The Alligator and Cheetah skeletons in this banner image were modified from CT scans originally publshed by Macaulay et al. (2023) and Coatham et al. (2021), respectively - each of these were major data sources for this particular study.

11.09.2025 23:06 β€” πŸ‘ 6    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Forgot to announce I have a new paper out this week! Animals that are more front-heavy have thicker, differently shaped forelimb bones to deal with the extra load. Limb bones alone may thus be useful proxies for body shape - but posture complicates things. royalsocietypublishing.org/doi/10.1098/...

11.09.2025 23:06 β€” πŸ‘ 76    πŸ” 24    πŸ’¬ 4    πŸ“Œ 0
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Style test for a tutorial series I'm putting together.

Will probably redraw the life head shot, as I kinda rushed it.

01.09.2025 00:01 β€” πŸ‘ 111    πŸ” 16    πŸ’¬ 2    πŸ“Œ 0
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A lighting turnaround of the new-look Spicomellus I made for the PR materials. Was really cool to see this clip + the turntable on BBC news last night.

I'm really happy with the copper patina vibe I settled on for the colours. This was my first time working in Substance Painter!

28.08.2025 20:02 β€” πŸ‘ 158    πŸ” 34    πŸ’¬ 0    πŸ“Œ 0
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27.08.2025 15:33 β€” πŸ‘ 120    πŸ” 27    πŸ’¬ 6    πŸ“Œ 6
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Introducing a crazy new look for Spicomellus, based on new osteoderms unlike anything we've ever seen before. I was brought in to produce a life reconstruction based on the new material, published today in Nature by Maidment et al:

27.08.2025 15:33 β€” πŸ‘ 275    πŸ” 67    πŸ’¬ 7    πŸ“Œ 3
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Hi all, me, @richardjbutler.bsky.social and the amazing UK-US-Moroccan team are delighted to announce that.. we have a new specimen of Spicomellus AND IT'S WAY WEIRDER AND WAY COOLER THAN WE EVER IMAGINED!!

27.08.2025 15:20 β€” πŸ‘ 968    πŸ” 373    πŸ’¬ 33    πŸ“Œ 106
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Matt Dempsey’s profile Matt uses Letterboxd to share film reviews and lists. 28 films watched. Favorites: Jurassic Park (1993), The Empire Strikes Back (1980), The Good, the Bad and the Ugly (1966), The Batman (2022). Bio: ...

Hey, follow me on Letterboxd: boxd.it/fvCuL

26.08.2025 00:46 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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I've been on a bit of a genre binge these last few days.

26.08.2025 00:46 β€” πŸ‘ 7    πŸ” 0    πŸ’¬ 2    πŸ“Œ 0

Insane movies to watch back to back

22.08.2025 02:41 β€” πŸ‘ 18    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
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Watching tonight - not the most conventional double feature ever, but I don't get into the city as often as I'd like, and I'm not missing an IMAX rerelease of one of my all time faves.

21.08.2025 11:29 β€” πŸ‘ 13    πŸ” 1    πŸ’¬ 1    πŸ“Œ 1
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All set up for @dinoconuk.bsky.social! Come by table 4 tomorrow... I have dinosaurs if you have coin.

15.08.2025 19:27 β€” πŸ‘ 75    πŸ” 9    πŸ’¬ 0    πŸ“Œ 0
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All set up for @dinoconuk.bsky.social! Come by table 4 tomorrow... I have dinosaurs if you have coin.

15.08.2025 19:27 β€” πŸ‘ 75    πŸ” 9    πŸ’¬ 0    πŸ“Œ 0
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