Chapter 45: Even if you give up your underboob, you can’t give up your belly button

“At first, I just thought that it would be enough to express the sweat well.”

Jina muttered to herself, looking at the monitor.

On the screen, YouTube videos of VTubers and cam girls doing VR fitness streams were playing in different windows.

…This is just for research purposes, of course. It’s not my hobby.

The fact that I’m playing them at 2x speed is proof of that. Otherwise, I would have been watching them leisurely at normal speed or 1.5x speed.

“More than that, adjusting the avatar so that clipping doesn’t occur is a more important issue.”

While the number of views for VR fitness content videos done by ordinary cam girls skyrockets, the reason why the number of views for VR fitness content videos done by VTubers is terrible is, after all, realism.

Hair passing through the arm.

The skirt fluttering and then going inside the thigh.

If you’re watching this, viewers will inevitably lose immersion.

In particular, the clipping phenomenon is more prominent in exercise content, where intense movements are the main focus. And solving this problem takes a lot of work.

“The sweat effect can be solved later by creating a formula and applying textures, but this will require touching the physics engine…”

Considering that Fall is also doing tests, Jina’s actual working time is less than five days. I’m properly doing a time attack.

The only good thing is that this problem is in the area of physical formula calculation, not in the area of design. So there’s no need to roll AI gacha.

“What? If I just pour time into it at a fixed price, the result is guaranteed?”

This is completely awesome.

Jina first imported Fall’s avatar into the VR modeling tool.

The avatar of a blonde-haired twin-tailed girl with a bright smile was floating in the air in the so-called ‘T-pose’, with both arms spread out to the sides.

First, I ran a simple simulation.

Arm swing, walking, running, jumping, and bending the waist and arching the back.

I applied these simple basic movements one by one.

“Still, the basics are well done.”

Each movement is natural.

I put a lot of thought into it from the beginning when I made the avatar.

Moreover, Fall is the most energetic and active member of Seasons.

Therefore, when I made her avatar, I set the range of physical interactions more precisely.

“The problem is when the movements get bigger…”

But no matter how hard I cut the collision area, I couldn’t cover all situations.

If you run vigorously, your arms don’t pass through your thighs.

If your hair happens to touch below your knees, it passes through as it is.

It was even more spectacular when I split my legs to both sides. The polygons in the crotch area were completely broken.

“I need to set the restrictions again.”

Jina scratched her head.

The arms and legs still show some angles, but it seems it will take quite a while to properly solve the hair problem.

“I had a hard time with this hair in the past… really.”

A past day suddenly comes to mind.

Looking back, the first task I received on the freelancer site was to solve the hair clipping problem that occurred in Fall’s avatar.

“In the end, I didn’t use that avatar, but I made a new avatar instead.”

Still, that request eventually became the beginning of the relationship.

Could there have been a connection between Jina and Cosmo Live if it weren’t for Fall?

Of course, as Jina has excellent talent as a 3D artist, she would have somehow connected with Cosmo Live, but. There may not have been Seasons successfully debuting with a new avatar and spectacular content.

“First of all, I need to fix the hair again.”

Jina is the type to eat the strawberries on top of the strawberry cake last.

Jina’s working style is to finish the difficult and annoying tasks first, and then mechanically process the easy tasks with a dazed mind.

So I opened the collision area setting window of the modeling tool and started checking from the bottom of the hair.

First, I tied the hair into one.

The twin tails became a ponytail.

This alone cut the annoying work in half.

Then, I divided the hair into four or five sections and finely adjusted the collision judgment range for each section in a trapezoidal shape.

Don’t use curves.

I can’t plant a potential time bomb in the model that I don’t know when or how a bug will explode.

Even if I compromise on the quality, I can never tolerate bugs.

This is a natural mindset if you want to apply it to a live broadcast.

At the same time as adjusting the hair, I changed all the movement instructions of VR fitness into prompts and put them into the T2M (Text to Motion) model and ran it.

This is a so-called AI model that turns text into animation.

Based on the result value, the body parts that the hair was likely to touch were displayed as a heat map.

The arms and back, where the hair touches the most, were dyed bright red.

On the other hand, the lower part of the knee, where the hair is unlikely to touch, was surrounded by a light blue color.

“If I put a formula applying the heat transfer function here…”

Jina muttered to herself and pounded the keyboard as if she were abusing it.

Clearly half is Korean and the other half is English, but less than 10% of the words can be understood by the general public.

As the keyboard screamed, Fall’s avatar gradually became complete.

The hair that penetrated the skin or floated awkwardly gradually found its place.

That’s how the day passed.

The next day, I checked the avatar’s clothes.

Fall had sent a concept document for the gym background by email the night before.

As if she were the idea bank representative of Seasons, the document contents were very detailed.

There was only one outfit that came to Jina’s mind after seeing that.

“Sports bra top and leggings. This is definitely it.”

It’s a very researcher-like outfit selection.

I don’t want to cause any problems by putting on awkwardly fluttering clothes. I minimized the amount of work by putting on clothes that stick tightly to the body.

Personal preferences and ulterior motives were hardly reflected.

Even if it was reflected a little, it would be about 10% at most?

“Sigh… I want to do an underboob, but I think the clean bot will catch it… Emphasizing the hip line and the fat pinching on the rubber band of the pants won’t be caught by the review, right?”

Correction. It’s 30%.

“I can give up the underboob, but I can’t give up the belly button.”

No, it’s more than 50%.

“I made it, but Fall-nim’s avatar is definitely well-made.”

First of all, it was a slender body shape.

Nevertheless, the body line unique to the female body is very prominent.

From the chest, which is smaller than Summer’s, of course, and definitely larger than Spring’s.

The curves that connect smoothly to the waist, hips, and leg lines catch the eye.

So, it’s an avatar that’s perfect for wearing leggings.

“It seems that there are no problems on the surface, but…”

Jina muttered, zooming in on the modeling tool window.

“There will definitely be crazy perverts who clip it, pause it, and then zoom in on the screen.”

One of those crazy perverts is Jina.

As expected, after repeating the rendering test at a close distance, a problem occurred where the flesh folded unnaturally on the inside of the thigh and the hip line.

If I do lunge or squat movements in this state?

The model was sure to collapse, with the area between the thighs and hips digging in vertically.

After manually modifying the model stitch by stitch, as if stroking her waist, I ran the simulation again.

The action of Fall’s avatar going down, stopping, and then coming up was repeated.

Test Case 1.

The hair barely skimmed the forearm, but there was no problem of passing through.

Test Case 2.

The bra top was about to overlap the waist line slightly, but the collider bounced it off in a flash.

Test Case 3.

When the leggings are pulled taut, the opacity value decreases… The fair skin that subtly shines through the dense grid pattern… Perfect.

“Everyone will be satisfied enough with this.”

Before pressing the save button, Jina dressed Fall’s avatar in a thin white training jersey and zipped it up.

Arousing from the beginning and gradually becoming aroused.

If I had to choose one of the two, it would definitely be the latter.

The moment I spread out the blanket and lay down, intending to sleep early for the first time in a while.

A message arrived from Fall.

[Fall: Jina Mama! I was thinking about it, and when you exercise, your heart beats a lot and your breath gets really rough, right? (An entertainer bouncing her chest emoticon)]

[Fall: So, how can I express this intensely to make it look more realistic?! (An anime character shouting Kininarimasu- emoticon)]

[Fall: That… you know! Breath comes out, or the chest rises up and down….]

[Jina: (Thumbs up emoticon)]

[Jina: (Graduate student chick pounding the laptop day and night emoticon)]

Jina kicked the blanket and sat back in front of the computer.

I couldn’t possibly sleep because all sorts of inspiration were popping up in my head.

“It’s not enough for the chest to just get bigger and smaller. It would be nice if the stomach also bulged a little and went in…”

I threw away all the existing anime-style breast morphing.

Instead, I set the initial value of the animation in which the upper part of the chest and the abdomen naturally increased and decreased.

“I need to apply a breathing rhythm here…”

It’s difficult to accurately match the avatar’s breathing animation at the moment when a real person is breathing.

So, based on the intensity of the exercise and the time, I created a simplified breathing rhythm formula.

“…It might be better to attach a heart rate sensor to the VR device.”

The cost is a bit concerning, but I called Youngjun for now.

“Hello? Yes, Youngjun-nim. There’s some equipment I need, so I’m requesting a purchase…”

Before I could even finish speaking, an OK sign came back.

Daon said to support anything Jina needs.

I added the heart rate value to the formula and ran the simulation again.

The chest and abdomen were rising and falling rapidly, and both cheeks and the ends of the ears began to turn red.

At the same time, the sound of the heartbeat is heard as ASMR, subtly piercing the ears.

What if Fall adds a tired sigh of ‘Haa, haa…’ here?

“All the maple leaves are dead.”

New-Neo Awesome Fall, ready to sortie.