Visualization of multiscale data is becoming increasingly important in all biomedical research projects. Huge amounts of data are being collected worldwide at all scale levels (from genes to body level). However, there is a clear lack of software tools to support the interactive inspection of these large data collections. A research consortium has been established to identify the challenges associated with real use case scenarios and to produce, in the next year, an open source library (MSVTK) to be used by any research project to effectively inspect and visualize multimodal, multidimensional and multiscale data. We will review here the challenges associated with the development of this visualization software library and the preliminary approaches under investigation.