Call for Papers Workshop on Molecular Graphics and Visual Analysis of Molecular Data 2021 co-located with EuroVis 2021 - June 14th, 2021, Zurich, Switzerland Molecular visualization is one of the oldest branches of scientific visualization, which has been developing for over 50 years. Nevertheless, it is still a very active research area mainly due to the continuous advances in computational biology and computer graphics techniques. Not only the ever-increasing dataset sizes yield a constant challenge for visual analysis, but also new technologies like advances in web-based graphics or augmented and virtual reality open new possibilities. This multidisciplinary workshop - which is held in conjunction with EuroVis for the fourth time - brings together visualization and computer graphics researchers working with molecular data. This year the MolVA Workshop teamed up with Computer and Graphics journal and we are happy to announce that the submitted papers will be accepted either as journal publications or conference-only publications. The journal publications will be published directly in Computers and Graphics Journal (C&G) Special Section on Molecular Graphics and Visual Analysis of Molecular Data, while the conference-only papers will be published in EG Digital Library. Moreover, the conference-only publications will be offered to submit an extended version that will undergo another peer-reviewed process and can be still accepted as a journal publication after the workshop. We invite short papers as well as full papers (2-4 pages for short and up to 8 pages for full papers, both with an additional page reserved for references). Note that short papers are not eligible for journal publication but can be extended after the workshop to full-papers and submitted in the second round. All submissions will be peer-reviewed by at least three experts in two-cycle review according to the standards of Computers and Graphics Journal. You can find the complete author guidelines at: https://www.elsevier.com/journals/computers-and-graphics/0097-8493/guide-for -authors. All accepted papers will be presented at MolVA 2021 Workshop which will be co-located with EuroVis 2021 in Zurich, Switzerland. Therefore, at least one of the authors of an accepted paper will have to register and attend the workshop. We hope that MolVA 2021 can be held as an in-person conference but depending on the pandemic situation next year, we may adhere to some preventive measures. We will follow the scheme that will be put in place by EuroVis conference. Suggested topics for papers include, but are not limited to: * Molecular Graphics & Rendering * Web-based Molecular Graphics & Visualization * Immersive Analytics approaches using, e.g., VR/AR technologies * Visual Analysis of Molecular Data (e.g., molecular structures, biological networks and pathways, or omics data) * Visualization of Dynamic Molecular Data & Large Molecular Systems * Machine-learning approaches for analysis of molecular data * Tools papers describing new molecular visualization tools or novel features in existing tools