Allosaurus fragilis 3

So it has been a while...and for my rehabilitation, I give you, tah-dah... Allosaurus again! Well, it could be any non-descript tetanuran theropod...from this angle anyway. Again, this is one of my series(?) of practice drawings, and for that, who else but Allosaurus? I have attempted this angle before but never as "good" as this one turned out to be - at least I think it looks good enough.

Anyway, I had a bit of a problem with my scanner when trying to upload this - it always came up with some weird faint line across the middle. I tested all sorts of different papers and book covers to see what the cause was. It came out fine on really strong colours and backgrounds with multiple colours so I determined it was something to do with white so I thought it might need some adjustments or something. And I found the callibration button! Woohoo! Such a simple thing and it takes a postgrad student nearly half an hour to figure out...

Comments

Zach said…

Good angle! Also, I like the new site layout. Much easier to read now. I have a lot of trouble scanning pencil drawings, because they come out so faint. I have to darken the scan and increase the...something. You've probably seen some of the obviously penciled drawings on my blog. The finished scan is almost yellow, which bugs me, but I don't have time to ink EVERYTHING! :-)

12 June, 2008 00:13

Raptor's Nest (old) said…

As always, thanks for your comments Zach!

Yeah, I got fed up with that long and narrow text box format...I liked the colour scheme but made it difficult to layout around pictures.

And I get what you're talking about with scanning pencil drawings...the scanner picks up any faint smudges or even the colour of the papers - so I try and get as white a paper as I can.

12 June, 2008 01:43

The difference between Lion and Tiger skulls

A quick divergence from my usual dinosaurs, and I shall talk about big cats today. This is because to my greatest delight, I had discovered today a wonderful book. It is called The Felidæ of Rancho La Brea (Merriam and Stock 1932, Carnegie Institution of Washington publication, no. 422). As the title suggests it goes into details of felids from the Rancho La Brea, in particular Smilodon californicus (probably synonymous with S. fatalis ), but also the American Cave Lion, Panthera atrox . The book is full of detailed descriptions, numerous measurements and beautiful figures. However, what really got me excited was, in their description and comparative anatomy of P. atrox , Merriam and Stock (1932) provide identification criteria for the Lion and Tiger, a translation of the one devised by the French palaeontologist Marcelin Boule in 1906. I have forever been looking for a set of rules for identifying lions and tigers and ultimately had to come up with a set of my own with a lot of help...

Old drawings: Allosaurus

Recently, I came across a stash of old drawings that I had completely forgotten about. I'll try and upload them in the next week or two. Some are palaeo, others are not, but still quite interesting nonetheless... Here is the first. I think it is an Allosaurus head. At least the skull looks like an Allosaurus and it has lacrimal horns like an Allosaurus , so it must be an Allosaurus . Nothing special I guess...

R for beginners and intermediate users 3: plotting with colours

For my third post on my R tutorials for beginners and intermediate users, I shall finally touch on the subject matter that prompted me to start these tutorials - plotting with group structures in colour. If you are familiar with R, then you may have noticed that assigning group structure is not all that straightforward. You can have a dataset that may have a column specifically for group structure such as this: B0 B1 B2 Family Acrocanthosaurus 0.308 -0.00329 3.28E-05 Allosauroidea Allosaurus 0.302 -0.00285 2.04E-05 Allosauroidea Archaeopteryx 0.142 -0.000871 2.98E-06 Aves Bambiraptor 0.182 -0.00161 1.10E-05 Dromaeosauridae Baryonychid 0.189 -0.00238 2.20E-05 Basal_Tetanurae Carcharodontosaurus 0.369 -0.00502 5.82E-05 Allosauroidea Carnotaurus 0.312 -0.00324 2.94E-05 Neoceratosauria Ceratosaurus 0.377 -0.00522 6.07E-05 Neoceratosauria Citipati 0.278 -0.00119 5.08E-06 Ovir...

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