Many developers purchased assets between 2015 and 2016 that were never updated. The developers of those assets have since abandoned them. These assets often break in Unity 2019+ due to API changes (e.g., removing UnityEngine.BillboardRenderer or updating NetworkView to Netcode ). Unity Pro 131 supports the old networking API ( UNET legacy) and the standard shader pipeline without the "Scriptable Render Pipeline" (SRP) conflicts.
The request for a "Unity Pro 13.1 download full" typically refers to (formerly known as Unity Pro ), which is professional automation software from Schneider Electric . Unity Pro 13.1 (Schneider Electric) Overview unity pro 131 download full
Navigating Unity Pro 131 Downloads: Legacy Software, Licensing, and Safety Many developers purchased assets between 2015 and 2016