Unity 3D on Fedora 31 Linux distro.

First, you need to have good hardware to run the Unity 3D software on Fedora 31 Linux.
To install on Fedora 31 Linux is easy to do. You need to download the Unity beta application from this website.

[mythcat@desk ~]$ cd Downloads/
[mythcat@desk Downloads]$ chmod +x UnitySetup-2018.2.7f1 

You need to install this package for this file: libgconf-2.so.4

[root@desk Downloads]# dnf install GConf2-devel.x86_64

The next step is simple run the installer and follow the interface...

[mythcat@desk Downloads]$ ./UnitySetup-2018.2.7f1 

If you want to use a free license then you need to save the license from application into the file named Unity_v2018.2.7f1.alf .
Using the Unity website manual activate the free license and download the file named Unity_v2018.x.ulf. You can use the UnityHub.AppImage from Unity official website to install any Unity 3D version:

[mythcat@desk Downloads]$ chmod +x UnityHub.AppImage 
[mythcat@desk Downloads]$ ./UnityHub.AppImage 

See the screenshots:

The new Huion Sketch application for drawing.

The development team from Huion comes with this intro:
 Huion Sketch is an intuitive drawing app with a palette icon and notebook icon for sketching and noting. The interface of the notebook is in a minimal design with several brush and color options on the top. The art canvas boasts a range of drawing features while maintaining a minimalistic interface.
Huion Sketch offers you more creative possibilities with 18 brush options, layers, and many tools.
You can use multi-touch gestures with your workflow.
All Huion tablet models with the firmware upgrade, including H320M, HS64, HS64 SE, HS610, and Q620M are all compatible with Huion Sketch.
The official webpage can be found at this website.
The application for android O.S. can be downloaded from Google Play.
You can see a video tutorial from the official youtube channel of Huion.