3D Character Creation for Interactive VR

3D Character Creation for Interactive VR

The third year of VRTogether is in full swing, and despite the recent pandemic scare our consortium is hard at work creating the technology and content for our third-year pilot. As we have described before, pilot 3 will involve an interactive scenario where users take on an active role trying to solve the mysterious murder of Elena Armova.

Pilot 1 involved a one-take interrogation scene observed by our users, and was created using three different content formats; 360 degree video, a 3D scene with billboard video, and a 3D scene with 3D characters. For this last option the actors were captured using a custom photogrammetry rig from Artanim with more than 90 cameras, after which their 3D mesh was reconstructed and subsequently rigged and animated using mocap data. The three formats allowed us to evaluate their tradeoffs in a VR context. The results indicated that in general the video billboards were preferred by users for their visual quality and natural appearance, but their main shortcoming is that user movement is very limited before such billboards no longer maintain their illusion.

Pilot 3 puts the users at the scene of the crime. Standing at and moving between different locations in Elena Armova’s apartment, they observe and interact with the characters in the scene. This, given the aforementioned shortcomings of a video billboard solution, means we will see the return of 3D characters. An additional downside of a billboard solution would have been the difficulty to have a seamless continuity of a variety of recordings. The interactivity inherent to the plot will see our characters respond to our user’s actions, wait for their response and progress along several possible paths. To seamlessly blend these various branches in our timeline, the only truly feasible option is to opt for 3D characters, driven by a full performance capture (motion capture for the full body including the fingers and face).

Having evaluated the 3D characters of Pilot 1, the consortium wanted to aim for a higher visual quality for Pilot 3. While a commercial 3D photogrammetry solution has been considered, both financial and scheduling constraints made this impractical. Luckily content creation solutions have not stopped evolving over the last few years, among which Reallusion’s Character Creator ecosystem – as well as other tools – which will be used to create our 3D characters. Characters created with the tools in this ecosystem are easily animated in real-time 3D engines such as Unity, by motion capture data from the body and hands all the way to facial animation.

Besides executing the motion capture, Artanim and its artists have taken on the task of creating our high quality virtual characters. The first step in the process is the collection of as much reference material as possible. The COVID-19 pandemic made taking in-studio headshots impossible, but some of the actors involved were already photographed as a part of pilot 1, while others supplied as much reference material as they possibly could. This includes high quality photos of their head from all angles, full body shots, as well as a set of body measurements to make sure their virtual counterparts match their own morphology. Ensuring a close match between the two also simplifies the retargeting stage while post-processing the motion capture.

Reference headshots of actor Jonathan D. Mellor who plays the character of Sarge.

Modern AI approaches have evolved quite significantly in recent years, leading to major advances in image processing in general, and obtaining 3D information from monocular views in particular. These developments find their way into content creation tools such as Character Creator’s Headshot AI plugin used as a basis for our character’s heads. Such tools do a commendable job based on a single image from a single view, but the creation of a more correct likeness still involves quite a lot of manual work, taking the generated output as a basis, carefully modifying the obtained 3D mesh to more closely match our actors’ morphologies.

The AI-generated output (left) needs significant artist intervention to get a good likeness (right), in particular for faces with asymmetrical features.

This is then followed by the addition of hair geometry, textures, shaders and materials to get a final real-time VR ready result.

After the addition of hair, textures and material setup, Sarge’s head is complete.

Without the use of 3D scans, the creation of the body is still a largely artistic process. Starting from a basic avatar body, it is up to the artist to adjust the basis to the actor’s appropriate sizes, and to adapt or model 3D clothing and accessories – including meshes, textures and materials – to get a high quality end result.

The end result is a high quality 3D representation of our actors, which can be used in interactive real-time VR scenarios for an exciting immersive experience.

I know you! : The importance of accurate self-representation in VR

I know you! : The importance of accurate self-representation in VR

At the heart of the VR-Together project lies the objective to enable social VR experiences with strong feelings of immersion as well as co-presence. To achieve this strong social sense of sharing a space together, photorealistic real-time representations of users are used, rather than relying on abstract avatars as found in such offerings as Facebook Spaces or AltspaceVR. Using state-of-the-art technologies developed by consortium partners and off-the-shelf hardware such as Microsoft Kinect or Intel RealSense sensors, users are scanned in real-time and the captured representations are processed and streamed as point clouds or time varying meshes (TVM). These approaches to user representation, combined with HMD removal technology, allow users sharing the virtual space – while in geographically separate locations – to see each other in all three dimensions.

Early feedback from users of the Pilot 1 demonstrations regarding the ability to see themselves and others, has been positive. The question still remains however, whether or not accurate self-representation has a significant positive impact on your sense of immersion, co-presence and the overall quality of experience. Both when seeing yourself as well as when interacting with others sharing the same virtual environment with you.

To answer this question, VR-Together consortium partner Artanim will this summer run an experiment in which users will be placed in a virtual environment in which they are virtualized by a representation of themselves at varying levels of realism and likeness.

User representations will be created at 3 different levels of accuracy:

  • An abstract avatar-like representation which does not match the participant
  • A realistic representation of the participant
  • An in-between more abstract – perhaps cartoon-like – representation of the participant, which is still recognizable, but steers clear of such undesirable effects as the “Uncanny Valley”.

To evaluate self-representation, single users will be placed in a virtual environment in which, by means of a virtual mirror, they will be able to observe themselves. The question there is whether or not an increased likeness improves the overall VR experience. To evaluate the importance of avatar likeness in the representation of others, pairs of users who know each other (i.e. friends or family) will share a virtual environment together, again being represented at varying levels of likeness. The goal there is to understand the effects on such aspects as immersion, togetherness and quality of interaction.

The proposed experiment will help us better understand what scenarios benefit most from realistic and recognizable user representation in Virtual Reality experiences, and to what extent realism is desirable in social VR.

Geneva 1850: A revolutionary journey

We are proud to announce the opening of the VR experience Geneva 1850: A Revolutionary Journey co-produced by Artanim and the Museums of Art and History of Geneva. The immersive installation will be open to public starting from April 12th at Maison Tavel, the oldest standing building in the city of Calvin.

Headset strapped to your head, movement sensors attached to your wrists and feet, you are now all geared up to dive into the Geneva 1850 experience. This VR installation immerses users into the Geneva of a time when the city was on the brink of modernity. In groups of four, impersonating period costume-clad avatars, users are given a chance to discover the city as it was in October 1846, just days before its people rose up in insurrection. Featuring a spectacular number of special effects, the experience is not only a visual, auditory and olfactory one. It also includes a physical and haptic dimension — users can feel themselves walking around the virtual city and pick up actual objects to interact with their environment, their fellow travellers and city dwellers.

Based on 3D data collected through the digitization of the Magnin model exhibited at Maison Tavel, this extraordinary experience is an invitation to travel back in time and witness the outbreak of Geneva’s “Fazy” revolution.

More info

April 12th-July 14th, 2019 – Maison Tavel, Rue du Puits-Saint-Pierre 6, 1204 Geneva.
August 1st-September 29th, 2019 – Museum of Art and History, Rue Charles-Galland 2, 1206 Geneva.
Open from 11am to 6pm, closed on Monday.

Reserve your tickets for a journey through time at MAH-GENEVE.CH
Approximate duration: 45 min.

Download flyer
Press kit upon request

More info about Artanim’s VR platform

Geneva 1850 - Horse-carriage ride in front of St-Pierre Cathedral Geneva 1850 - Journal de Genève with James Fazy and General Dufour

Geneva 1850 - Balloon flight

Dreamscape opens first permanent VR storefront

Dreamscape Immersive, the story-oriented VR company leveraging Artanim’s VR technology and whose backers include movie chain AMC Entertainment and several Hollywood heavyweights (MGM, Warner, 21st Century Fox, Steven Spielberg, Hans Zimmer), opens its first permanent location in the same upscale Los Angeles mall where it ran a pop-up storefront last February featuring its sci-fi-themed Alien Zoo experience.

The permanent storefront in the Westfield Century City mall will initially provide dedicated “theaters” and suit-up areas for three different experiences: Alien Zoo, the undersea adventure The Blu: Deep Rescue, and the Indiana Jones-style Lavan’s Magic Projector: The Lost Pearl. Tickets cost $20, get them here. The new location is part of a rapid expansion effort by the company, which plans to roll out stand-alone and in-theater venues (in partnership with AMC Theatre) outside of California.

Follow Caecilia Charbonnier and Sylvain Chagué, who are also the co-founders and co-CTOs of Dreamscape during the opening day at Westfield. Below, some pictures of the elegant Dreamscape store.

Dreamscape Immersive Store Dreamscape Immersive Store

Dreamscape Immersive Store Dreamscape Immersive Store

Your body feels good

Your body feels good

Do you feel in control of the body that you see? This is an important question in virtual reality (VR) as it highly impacts the user’s sensation of presence and embodiment of an avatar representation while immersed in a virtual environment. To better understand this aspect, we performed an experiment in the framework of the VR-Together project to assess the relative impact of different levels of body animation fidelity to presence.

In this experiment, the users are equipped with a motion capture suit and reflective markers to track their movements in real time with a Vicon optical motion capture system. They also wear Manus VR gloves for fingers tracking and an Oculus HMD. At each trial, the face (eye gaze and mouth), fingers and the avatar’s upper and lower bodies are manipulated with different degree of animation fidelity, such as no animation, procedural animation and motion capture. Each time, users have to execute a number of tasks (walk, grab an object, speak in front of a mirror) and to evaluate if they are in control of their body. Users start with the simplest setting and, according to the judged priority, improve features of the avatar animation until they are satisfied with the experience of control.

VR-Together VR-Together

Using the order in which users improve the movement features, we can assert on the most valuable animation features to the users. With this experiment, we want to confront the relative importance of animation features with the costs of adoption (monetary and effort) to provide software and use guidelines for live 3D rigged character mesh animation based on affordable hardware. This outcome will be useful to better define what makes a compelling social VR experience.

VR-Together