The AltMM 2018 workshop aims at exploring how the synergy between multimedia technologies can foster the creation of alternate realities and make their access an enriching and valuable experience. We seek contributions that present multimedia technologies, methods and measurement approaches from the perspective of "enabling other realities".

In particular, prospective contributions must address one or more of the following dimensions when characterizing the type of multimedia alternate reality that they are aiming for:

• Alternate ‐ refers to what is alternate about it: different space, time, situation, and so on;
• Virtual/Augmented ‐ how far or close to the actual reality content can be experienced, ranging from totally virtual to augmented reality (VR/AR);
• Real/Fictional ‐ how real or fictional the content is;
• Interactive ‐ the level of interactivity as a means of engagement and immersion;
• Immersive ‐ level in perceptual, cognitive and emotional terms, the sense of presence and belonging, the quality of the content and the experience, imagination and engagement;
• Multisensorial ‐ the media involved and how much mulsemedia it is, also going beyond audiovisual content to include the five senses;
• Personal ‐ adaptation to individual preferences and contexts;
• Social ‐ individualized vs shared experiences and communication.

Contributions should aim at enabling alternate realities experiences through multimedia technologies, design and evaluation methods for their creation and consumption. This involves the use of different types of media content (audiovisual, haptics, smell, and taste), increased immersion (e.g., 3D, holographic, UHD, 360°, and stereoscopic audio), new interaction devices, environments, modalities, and formats.
Topics of interest include but are not limited to:

Creation and Consumption of Alternate Realities

• capturing and sensing
• content production and authoring, interactive storytelling, digital narratives, cinema and TV
• crowdsourcing and co‐creation
• delivery, rendering, and consumption paradigms , co‐experience and communication
• personalization, post‐processing, enhancement and real‐time adaptation

Design and Evaluation of Alternate Realities Experience

• assessment and prediction of engagement, immersion and flow
• experience evaluation through analysis of quantitative (e.g. physiological data, self reports) and qualitative data (e.g. observations, in-depth interviews)
• measurements and metrics to quantify the quality of alternate reality experiences
• field trial reports and user studies

Alternate Realities Applications

• from more traditional to innovative applications, e.g. based on multi‐device and multisensory shared content consumption, in asynchronous or live scenarios
• in domains like personal media, culture, tourism, art, education, entertainment, manufacturing, training, health and wellbeing, etc.

The full day workshop program will contain a combination of oral and invited keynote presentations, posters and demos, altogether enabling interactive scientific sharing and discussion between practitioners and researchers. AltMM 2018 welcomes submissions of full papers (max. 6 pages), as well as short papers (max 4 pages) that report work‐in‐progress, presenting new, unpublished, original research. Accompanying demonstrations or videos are very welcome and highly appreciated.

All submissions must be written in English and formatted according to the ACM Proceedings style (templates in the submission page), and they must contain no information identifying the author(s) or their organization(s). Reviews will be double‐blind. Papers will be judged on their relevance, novelty, scientific and technical content and correctness, and clarity of presentation.

The workshop proceedings will be published in the ACM Digital Library. Further, a Special Issue of a top ranked multimedia journal related to the workshop series is being planned.