Request for ability to set opacity of certain parts of meshes

Description of the limitation and why it is relevant to address

As a user of the VIKTOR platform, I want to set the visibility or opacity of meshes within the platform so that I can better visualize complex models and focus on specific elements without distractions.

This is relevant for the VIKTOR platform because it enhances the user experience by providing more control over how models are displayed, making it easier to analyze specific components in detail. This feature is particularly useful in scenarios involving layered or overlapping geometries where clarity is essential.