Hyoseung Kang

{ Brief Information

Title:

Goddesses taking Spring-bath (Onsen, è®ô»)

Date:

Jan.2017

Scene Author:

Hyoseung Kang, Republic of Korea.

Visual Computing - Master Computer Science Student (2018),

Universitat des Saarlandes, Germany. //s8hykang-at-stud.uni-saarland.de

Subjects of Interest:

Convex Analysis, and Optimization

Variational Methods

3D Opticflow reconstruction and Model learning

Cell microscopy for Medical Treatments research

GPU based cluster computing

Scene Statistics:

7,489,807 facets

9,497,369 nodes (BVS)

Ray recursion: 5 times

Super sampling: 300 times

Original Resolution:

1920 x 1582

*I wanted to further improve the quality but the rule of the rendering competition was to render within 12 hours in a modern desktop PC. This is how I came up with the quality factors. And for the height of the image which doesn't follow the modern standards was chosen for better description of the human body ratio.

}

{ Technical Elaboration, and Motivation

[1] Volume Rendering to describe the fog from the spring water: Most people aren't familiar with the public bath but this fog density is realistic to my eyes.

[2] Motion Blur (Blue-butterfly, flying around Dona): I could put more drastic motion but reduced considering the DOF.

[3] Pale turquoise colored, reflective, and bumpy water: The crouching Aphrodite is being reflected over the water surface.

[4] DOF-Camera (Focusing roughly around crouching Aphrodite):

This is the most frequent point that my friends complained commonly. But this is intentional for an artistic effect.

[5] Area Light:

This is an exterior scene. In such a case, it makes more sense to consider

only the sunlight, which makes more difficult to give a vivid lighting

in a synthesized scene compared to a well-lighted interior with many reflective

daily objects. Here, the ambient light is not of consideration.

The real sunlight comes from far in the distance, so it is almost in parallel

and equally distributed in a single direction for an observer on the planet earth

to backward the light incoming direction. The base color is set with Corn silk.

[6] Multi-Core Processing:

In cooperation with BVS (BVH + SAH), it is really important to have

such processing functionality to render high-quality scenes. Single-threaded,

a program even without an acceleration index structure would take literally a week

or more in this minimal quality setting for a Ray tracer.

[7] The Real-quality 3D models:

Every 3D models in this scene are not made by 3D graphics designers, except for

the spring water. But they are scanned and reconstructed by Computer Vision algorithms.

One of my favorite subject is Correspondence problems in Computer Vision (COPCV),

which the University Saarland (Mathematical Image Analysis Group) is robust at.

I want to apply such study in the area of 3D Dense Optic flow in Cell microscopy for breakthrough in Medical treatments research. So it was a key idea at the begining

to take 3D scanned models even though I re-create to give an alive story inside the scene.

[8] Motivation:

Mostly thanks to the work of Mr. Geoffrey Marchal, I could have tried many different

layout with different possible actors. And I also could have put some other artifical

objects or put even more synthetic effects from the Ray tracer.

But the point of the Rendering competition is how much can be a submission

touching, and artistic based on what students have learned through the course, not

just putting whatever learned to show one technically can do. i.e. Not a Frankenstein.

Hence, there were many trial and errors to come up with this layout,

selection of actors in my scene, choice of the environment, and which

kind of Ray tracer capability to kick in. During the work, I frequently faced

the failure of consistency in the scene.

In the end, I believe I gave life to the stone godesses and they're living

their life in this still frame. I tried the best not to deteriorate the beuaty of

all the original arts. Even though they are nothing but stones, it has ever been

touching masterpieces, and here, reborn with a story came from different places.

}

{ References

1. Actors from the Left:

[1] Aphrodite Braschi

[2] Venus Medici

[3] Dona (nameless)

[4] Aphrodite

+ [5] Butterfly (nameless)

[1] Aphrodite Braschi, from Quintilians villa in Rome, Greek, slutn. 4th century B.C., copy, Munchen, Glyptothek Inv. GI. 258, The Royal Cast Collection (Copenhagen, Denmark). Made with Memento Beta.

Aphrodite Braschi(https://sketchfab.com/models/27512b924b47465684a577b88830a779) by Geoffrey Marchal(https://sketchfab.com/geoffreymarchal) is licensed under CC Attribution(http://creativecommons.org/licenses/by/4.0/)

[2] Venus Medici, Cleomenes, son of Apollodorus. Greek, Hellenistic 3th / 2nd. century BC, Roman copy Florence, Galleria degli Uffizi Inv. 224, The Royal Cast Collection (Copenhagen, Denmark). Made with Memento Beta (now Remake) from Autodesk.

Venus Medici(https://sketchfab.com/models/708a4166439c45d799f4eaa40d0db70e) by Geoffrey Marchal(https://sketchfab.com/geoffreymarchal) is licensed under CC Attribution(http://creativecommons.org/licenses/by/4.0/)

[3] Love and interest, Museum of Fine Arts of Castellon de la Plana (Spain).

1887, Justo de Gandarias Planzon (Barcelona, 1846 - Guatemala, 1933).

Love and interest(https://sketchfab.com/models/6e9f5bd47fea439189a283c0a0137384) by egiptologo91(https://sketchfab.com/egiptologo91) is licensed under CC Attribution(http://creativecommons.org/licenses/by/4.0/)

[4] Aphrodite crouching at her bath - British museum

Aphrodite crouching at her bath (better)(https://sketchfab.com/models/854db6363e0b4957a93f8db4790510ec) by HoangHiepVu(https://sketchfab.com/HoangHiepVu) is licensed under CC Attribution(http://creativecommons.org/licenses/by/4.0/)

[5] Butterfly

Butterfly(https://sketchfab.com/models/35426d17345e4fd3b0532ed0fee951fa) by Tan(https://sketchfab.com/Tan) is licensed under CC Attribution(http://creativecommons.org/licenses/by/4.0/)

2. Architecture:

[1] Beit She'an Theater Columns: "The structure seen today is from the end of the 2nd C, which was used until the 8th C. The theater contained 7,000 seats, arranged in a 110M diameter structure which was cut into the hillside."

Beit She'an Theater Columns(https://sketchfab.com/models/e06cf1ec2fbe42b5a51b2b442937f6cf) by Abby Gancz(https://sketchfab.com/agancz) is licensed under CC Attribution(http://creativecommons.org/licenses/by/4.0/)

3. 2nd Environment:

[1] Ocean (as Spring):

[1] ocean wave test(https://sketchfab.com/models/f86f444dc7cc4458a0140f05a03c5896) by 3dartel(https://sketchfab.com/3dartel) is licensed under CC Attribution(http://creativecommons.org/licenses/by/4.0/)

}

{ Software

[1] Physically based Ray Tracing System built over the Course (C++)

[2] 3DS MAX

}

{ Course Information

Introduction to Computer Graphics - Winter Semester 2017/18.

Computer Graphics Group, Universitat des Saarlandes.

[1] Prof. Dr. Philipp Slusallek

[2] Stefan Lemme

[3] Arsene Perard-Gayot

}