Baking the Bird

When we last visited the statue of a certain golden eagle gobbling up a certain rattlesnake from a certain courtyard in the third Harry Potter film, I’d created a base mesh for the initial sculpt in a separate file…

…but I’d temporarily given up when the flight feathers proved more challenging than I’d expected. Although I didn’t share this last time, I’d actually gotten the head off to a decent start, especially for an artist who doesn’t do much sculpting:

But those dang wings were confounding me. Sculpting them was giving results that were messy and uneven, so I decided to try modeling each feather as its own mesh. This seemed more promising, but I still couldn’t get the feathers to “flow” nicely. They have a lovely sweeping three-dimensional curve to them in the film and I wanted to capture that.

After taking a few days off to stew over this frustrating problem, the right method became apparent. I created four different feather shapes/rotations/positions (absolute shape keys, for my fellow Blenderheads) and allowed Blender to…well, blend between them. After playing with them for a while, I finally arrived at a result I could feel good about:

I’m sure there’s an ornithologist somewhere out there having a heart attack over the anatomical tomfoolery on display here, but whatevs. At a certain point, I have to remind myself that this statue is just a tiny part of a much larger just-for-fun model – and only certain versions thereof, at that. It’s not lost on me that I’m putting more effort into this statue than is really necessary for the purposes of this project, but I view it as an opportunity to learn and practice organic modeling skills that I’ve tended to neglect.

Anyway, I began creating some basic materials and threw in a background HDRI for lighting. The same shape key technique worked for the tail feathers…

…but not for the finer, more textural plumage on the body. So I used Materialize (another piece of freeware) to help me create a textured sculpting brush from photography of real eagle feathers. Back in Blender, I used this brush to directionally “paint” three-dimensional feathers along the body. This gave me a great base texture; I reshaped parts of it by hand to create more convincing layers of feathers. Should be good enough, considering that this will mostly be seen from further distances.

I thought the legs and feet were going to be hard, but they actually turned out to be a lot of fun:

This brought the sculpt of the golden eagle to a state of completion! But at this point, this was all still real geometry – millions of tiny flat triangles connected together to form a complex, bumpy surface that slowed my computer down quite a bit. That’s where normal maps come in. I retopologized the statue into a nice, simple, clean mesh*…

…and then I baked all the details from the original sculpt into a normal map, an image that simulates the shading of the original detailed sculpt on the new simplified mesh. The result looks virtually identical, but the simplified model is waaaaaay less sluggish in terms of software performance, render times, and animatibility. (Shut up, I’ve decided it’s a word now.)

Next steps: creating the rattlesnake, posing the eagle to hold it, integrating the whole statue into the main model, and damaging the fountain to match its dilapidated state in the film. But I’ll save all that for another post. In the meantime, I’m just glad I decided to spend the extra time on this. Confession: I’d never actually done a full-on organic model like this, start to finish, from base mesh to sculpting to retopo and normal baking. It’s really boosted my confidence!

On a more serious note, I’m sure the recent months, weeks, and days have been very difficult for a lot of you. Sending lots of love, with the hopes that we will live to see – and create – a better tomorrow together.

* I’m not an expert in topology and edge flow…if you are, I very much welcome your critique! I’m sure I overcomplicated parts of this mesh, and there were a couple of hidden areas where I decided to just cut my losses and learn from my mistakes next time. The wings feature some staggeringly bad topology – spiral loops, super-squashed quads, and even a lone triangle – but I didn’t care much because these are almost entirely hidden by the feathers. They don’t even have any detail sculpted on them.

4 thoughts on “Baking the Bird

  1. I just found this blog and I have to say it’s awesome! You are very talented, great work. I wanted to do a 3D Hogwarts but I know I will not match this quality. I’ll be following the project.

    PD: Are you planning on making the full interior of Hogwarts?

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    1. Thank you so much! I would encourage you to still go for it, though. I know that feeling all too well – just experienced it this morning when looking at another modeler’s incredible work! (the__h__project on Instagram – check him out!) But it’s not a competition…it’s just about constantly learning and enjoying yourself in the process. =)

      As for the interiors, no, I’m not currently planning on doing much interior work – certainly not on the main model, since the castle exteriors rarely match the interiors. In that model, I’m only putting enough interior detail for it to “read” from the outside. Side projects like the moving stairs are fun, and I could end up doing more of those, but my main focus is on the ever-changing exteriors.

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      1. Oh my god, why are you two sooooo gooood?? It’s sad and exciting at the same time but I will follow your advice and try to keep going. It’s not going to be as good as yours but it would be mine, I could be ok with that. Keep going with your great work!!!

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      2. Yes, keep going! For any given hobby or passion or skill, there will always be someone out there who is (or seems) better at it. I always have to remind myself that being the best isn’t the point. The only way to get better is to keep at it! (And watch a lot of YouTube tutorials…those help too, haha.)

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