Rebecca

I said I would post a new model design when I reached 100,000 views for the blog and it's happened, so here we are.

As promised, I took my inspiration from an intriguing pose posted on Rebecca Tun's blog.

Plenty of challenges here for getting the pose right and then printing a decent model. I used the Daz 3D Genesis 3 base model and a pretty long hair style to try and match the photo.

I used my standard techniques for shrink-wrapping the hair in Blender to make a watertight solid model and then, combining the meshes in Project Miller (still one of the best tools for this job, in my view).

Over the last year I have been upgrading my printer to have dual extrusion capability and just recently I have successfully configured the two extruders to work fully independently of each other.

I used Rapunzel Silver PLA from Fillamentum in one extruder, and PolySupport from Polymaker in the other. This combination provides great support with no gaps but then breaks cleanly away once the model is cool. This results in some of the highest quality I have ever achieved. See for yourself!

80,000 views

In celebration of reaching 80,000 page views, here is a brand new sculpture I created to print on my new 3D printer. I started from this photo found on Pinterest. Unfortunately, I haven't been able to identify the model or the photographer. If anyone has any information, please let me know.

I use Daz Studio 4.9 to create a pose using the Olympia 7 model and Sally G3 hair. Here is the model in the Daz Studio interface.

After exporting the model from Daz Studio I used Project Miller to reskin the model and Blender to shrink-wrap the hair. I did a considerable amount of work using the sculpt tools in Blender to improve the look and shape of the hair whilst keeping it as printable as possible. Here is a screen grab of the final STL file.

I recently upgraded to a BigBox3D from E3Donline and here is the model printed using grey Edge filament.

A nice addition to the collection!

Not size zero

So, Daz 3D have finally seen the light and changed their EULA to allow 3D printing of their models, but only for non-commercial use. It is a relief to be able to use the software and models legally now, but I still can't share any of the meshes or sell the models that I create.

As you will know, if you have read any of my previous posts, I enjoy the challenge of trying to create beautiful sculptures by posing a 3D model to match either an existing photograph or an image that I have in mind. One of the aspects I have spent less time on is adjusting the shape of the woman's body. I received a comment from a reader asking whether I ever sculpted larger women and I had to admit that I hadn't tried yet, so this time I thought I would deviate from the default, skinny model body shape and try creating a woman who looks more typically average in body size.

I used the Victoria 6 body with the HD mesh add-on, which has more natural curves around the joints. I began with an idea for a pose in a fairly relaxed style and then played around with all the different character shape parameters , giving a modest 20% increase to the 'Heavy' setting and a 70% boost to the 'Weight' parameter. I'm not entirely sure what the difference is but it's quite an interactive process, so I just move the sliders slowly and stop when I see the effect I'm looking for.

Daz haven't just given permission for 3D printing of their models, they've simplified the whole process too. Upgrading to the latest version of the Genesis 2 models brings a new option to the Anatomy section.

This rather gruesome-looking add-on modifies the geometry of the eyes and mouth, turning them into closed meshes. It also replaces the front of the eye with a new, more sculptural representation of the iris and pupil.

I chose an elegant, raised hairstyle that still required my previously-described shrink-wrap technique to make a fully printable model.

The pose would clearly need support material turned on in several areas, as can be seen in the print below.

This is quite a small print, taking five and a half hours to print at 0.1 mm resolution. There are still some small blemishes left after removal of the support material, particularly on the underside of the model. There are also signs of irregularity in the Z-direction which need further investigation.

Overall, a very satisfying project.

Tyce

Well, I said I would start a new model when I hit the 50,000 views mark and it's happened. I was inspired by this photo of Eléa Joly by Antoine Tyce and so created a pose closely based on the original. 

The really big news this time is that HiveWire3D have released a new version of their Dawn model which has far better handling of extreme joint positions. And best of all, Dawn SR2 is fully licensed for 3D printing (non-commercial, personal use without an additional license). This means that I can now legally use my own 3D printers to print posed models.

The enjoyable part for me is working out how to pose the model in a realistic, but still printable, way, that looks both interesting and unusual but still natural and anatomically correct. I chose to move the left hand downwards to make printing easier and to allow me to scale the model up a bit larger inside the printable volume of my largest printer. Placing the left hand on the right thigh seemed natural and ensured a printable outcome. 

Making the resulting meshes printable is now just a minor chore that usually takes less than an hour to complete. Simplify 3D does a great job of generating just the right amount of support material so that the undersides of surfaces are printed as cleanly as possible. I still like to print at 0.1 mm resolution so that as much of the detail is preserved as possible. The print ran for 30 hours without a hitch and looks great.

Here are some photos and a video of the print before and after the support material was removed. I have lightly sanded the undersides in preparation for my first attempt at painting a model.

And now here is the model painted.

I used a matte black spray paint as an undercoat and then used a dry brushing technique to apply a metallic bronze acrylic paint.

Changing direction

Time to take stock and think about some new ideas.

This blog has had over 40,000 views now. Does anyone ever read these notes or do people just come to look at the pictures? Many thanks to those few people who take the trouble to comment on my work.

I can't sell these prints so I just have to store them all. I'm not allowed to share the model files because of copyright restrictions on the base meshes. The owners are showing no signs of releasing the promised 3D printing license. I sincerely hope this changes soon. The only other solution is to keep working at sculpting until I can stop having to rely on character posing tools.

3D printing is slow and expensive, especially for some of the larger models, which can now take over 24 hours to print. It's easy to forget that 2 times the size equals 2x2x2 = 8 times the volume (and hence time and cost). I recently tried printing Casual Undress at half the normal size and was pleasantly surprised by two things. Firstly, the print was finished in under 3 hours, and secondly, it still had an amazing amount of visible detail. I would definitely try that again.

The one thing I am least happy with, at the moment, is the ugly scars left behind on the underside of parts which have been printed onto support material. I do my best to hide these in the photos I take, but if you look closely at some of the videos it is easy to spot these unsightly blemishes. I have some interesting ideas about how to try some experimental techniques to improve this.

Perhaps more fundamentally though, maybe it is time to move on and start working in a different area. I am happy to maintain this record of what I have achieved with some free software and a cheap home-made 3D printer, but I'm beginning to wonder what fresh challenges await ...

Lush

This beautiful photo of Kayleigh Lush was one of the 100 photos taken by Ray Rapkerg and published on Twitter.

It's another interesting and challenging pose and also presents a great opportunity for me to practice sculpting hair.

The fingers of the right hand only make light fingertip contact with the ground which would present a problem during printing, so I have added a thin disc to anchor the hand firmly and take the weight of the right forearm.

Here is another angle which gives a better view of the hair.

The model printed well at the first attempt but needed plenty of support material under the face and breasts.

Here is a selection of views after removing the support material and ending with a video showing the model from all sides.

The next picture and the video were taken in full sunlight which brings out the amazing sheen in the printed plastic. It's called Christmas Green PLA from 3D Filaprint.

The obligatory full rotation view video.

Shame

I'm going to try and create a sculpture based on this picture next. I like the off-balance lines, the hidden face and the twisted shape.

The photo is by Tomas Rucker and is called 3 in his White series of nudes.

Here's the model I have created so far, viewed in Blender. The pose is clearly not identical but you can see where it takes its inspiration from.

When I came back to work on this pose I wasn't happy with it. The sinuous nature of the original pose had almost completely gone and the new hand position somehow changed the story. I decided to do some more work on the posing.

Then I thought it might be interesting to document the steps needed to make a posed model printable.

Hide the hair
Remove the eyelashes

Circle select eyes and mouth in side view

Shift-H hides everything else. Trim out the eyes and mouth and close up the holes in the mesh.

Hair models in character posing software are almost always totally unprintable items. I have found that the quickest way to make them printable is to use the ShrinkWrap modifier on a dense Isosphere placed in a position surrounding the hair model. Then using the project option in a negative direction, you can send all the points of the sphere inwards until they meet some point on the hair, leaving you with a single water-tight mesh. Some fairly intense smoothing removes all the jagged edges and leaves a very passable, and printable, copy of your chosen hair design. 

This just needs Boolean merging with the head which usually works OK, as long as the eyes and mouth have been fixed first. 

Now we need to deal with overlapping limb parts. There are several ways of doing this.
1. The quick and dirty method.
Use Autodesk's Project Miller to re-skin the visible external surface which hides any internal overlaps.
2. Use sculpt mode to flatten overlaps from the inside.
3. Use Boolean union to eliminate the overlaps. This option is interesting but doesn't work on a single mesh with overlapping parts. So why not just chop up the parts into separate meshes? Worth exploring, I think.

I started at the feet and worked upwards, using option 2 to eliminate any of the areas where the mesh of one limb poked through another. There is a typical example where the thighs cross. I used Box select to highlight all the affected vertices and then Shift-H to hide everything else.

From the inside you can see the bulge of the left thigh poking through into the inside of the right thigh, and vice versa.

I started by changing from Edit mode to Sculpt mode and then using first the Flatten brush and then the Smooth brush on the bulge to make it disappear. 

By working from both sides I could keep the contact area flat.

This works well where there is a small bulge across a large area, but is less effective where a larger, more complex part needs removing. So for the intersection of the arms and the left breast I decided to try a different tack and used option 3.

I rotated the model by 35 degrees around the vertical so that a horizontal plane would neatly bisect the upper arms. I then loaded the model into NetFabb which has a very nice plane cut function which provides a kind of X-ray preview of the slice before making the cut.

My cunning plan was to slice the model into a number of separate parts, make each one into a separate water-tight mesh and then Boolean merge them back together thus dealing with a number of complex overlaps at a stroke.

After making the cut, each half needed to be saved separately. The forearms, in the lower half, could then be selected and split off into a separate model. Here is the main torso piece.

My plan worked almost perfectly, only failing when the last piece in the sequence refused to Merge with the rest. I suspected that this was because the Boolean engine was struggling to cope with the intersecting parts and closing the loop of a torus and recognising the relative inside- and outside-ness of both ends at the same time. I fixed that by making another thin cut that took a slice out of the arms in an area with no complex intersections. Using that slice as the final merge then worked successfully. 

I added a simple bevelled cylinder to the base to make a stand. Eventually, I had reached the point where the only crossed meshes remaining were in both armpits. I spent a fairly lengthy mesh-editing session trying to clean up the mess but finally decided to take the easy way out and used Project Miller to re-skin the model for me. Don't know what I'd do without that bit of kit!

The main reason for going to all this trouble with the model was so that I could use Simplify3D as my slicer. Cura is better at handling faulty meshes but Simplify generates better support material that breaks cleanly away after printing.

I had intended to print this model on my tall delta printer, but it isn't coping well with this hot weather and the motors seem to be prone to skipping steps. So I went back to the Mendel90 and printed a small test version.

3D printed version in coffee-brown PLA before and after removing the support material.

Just like Pensive, one of my earliest works, the fingers are only slight wider than the extruded filament at this scale. It really needs to be printed twice as big as this. As soon as the cooler weather returns I'll try again on the delta printer.