Skyline vs O3DE (previously Lumberyard)

A growing community that is always helpful with dev response times averaging less then 24 hours. Often less than 12.

Skyline provides a straightforward drag and drop development environment that can be customized to suit individual preferences. Playing the game and animating the scene can be done from within the editor at any time.

Future versions will allow extending editor's functionality with plugins and offer an official way of trading custom plugins.

Skyline's commercial edition costs just £40, has no royalties or earning limitations and includes 2 activations per license purchase and a year of free updates.

Skyline can be run on a machine with 2GHz Dual Core CPU, 2GB of RAM and Nvidia's 9800 GT (or equivalent) GPU. While, obviously, higher specs are recommended, it's reasonable to expect around 60fps on small scenes with these specs.

The Terrain editor is easy to use and will include features such as hole cutting.
There is a differed lighting render for internal scenes, which makes creating multi light and beautiful/atmospheric scenes so much easier.

All the tools for the terrain are in one place such as placing road/paths, vegetation, billboards, and the settings are easy to locate and change.

Planned features include:
Hole cutting in terrain and
Terrain paging.

Making a game in the current top engines is hard work, making something small and basic in Skyline is not. Easy to learn drag an drop model placement and editing supplemented with easy to follow video's on forum make the process straightforward.

Including image based lighting.

A free version that's limited to non-commercial usage and lacks a few features is available.

Rendering of a water plane looks fantastic and is easily edited for different effects.

The schematic editor is designed to make it easier for non-programmers to create games.

Not much in it at the moment but is starting to grow and will continue to grow with an increase of users.

There are many additions to the engine that are on the road map such as multi threading and tree physics.
The feature list is constantly evolving with each user request and idea put forth.

Skyline has a custom editor that gives the user of making their own tools for use directly in the editor to develop their games. All the editors are made using the Qt Designer and programmed in lua inside the engine itself.

Open-Source Virtual Reality support is in development.

Shadow editor.
Weapon Class Editor.
Mesh Editor.
Advanced Mesh Editor.
GUI Editor.
Script Editor.
Environment Editor (volumetric clouds and day night cycle, lightening, ocean settings, height fog).
Particle Editor.
Path editor.
Schematic editor.
Navmesh editor.
Material editor.

The documentation is been rewritten and follows a structure like a course.
Introduction to > Level designer with examples > Artists

There is also video tutorials, video examples and video tutorial series been produced.

There are user created demo scenes, examples and more.

Making HUDs and GUIs has never been easier

Full PBR workflow, your not stuck to Secular or Metallic it has both

Can contact the Skyline developers and they will always respond and help as fast as they can.

As a proof of how much Amazon is committed to the project.

Advenced stereoscopic reprojection to save rendering time.

Sculpting and painting tools for terrain and instanced details.
Procedural generation of terrain.

Built-in support for roads and rivers to ease the design of rich game environments.

Full source code for Engine Editor and every tool.

Thanks to built-in terrain, time of day, ocean and volumetric fog systems. There is also a gfx pack with various environmental meshes, cloud, particles, materials and skyboxes.

Multiple entity contexts, reflection, serialization, replication, script binding, event bus (EBus) messaging, fully cascading prefabs (slices).
Every reflected property can be fully exposed in the editor with a customizable gui control and can be animated in the built in animation tools.

Online oriented plugins composed by both client, server and administration components to easily add various online capabilities without further work (es leaderboards, login, message of the day, downloadable contents).
Since version 1.7 they has been released at a steady rate.

Very advanced 3D prototyping tool with many modeling features and UV mapping support available. If you want you can build any kind of fully textured static mesh without relying on external tools.

Realistic looking lighting bounces.
It doesn't require long offline precomputation times like other static and dynamic GI solutions based on lightmaps or other similar techniques.

Other than common aws functionality it supports game specific Game Lift for autoscaling game servers.

Modular workflow and flexible cascaded propagation of changes.

To easy add and remove modular functionalities to a project and easy share them.
Modules are called Gems and can contain code and/or assets.

Tessellation and Displacement.
Various Parallax Mapping techniques(POM siluette).
Translucency and Sub surface scattering.
Detail Mapping.
Material Blending.
Emission.
Advanced uv transformation and animation.

Global environmental volumetric fog and/or hand placed custom shaped volumes with featuring full lighting and shadows.

Amazon made available a selection of triple A quality scenes filled with high quality assets.

Implements the most recent technique available (published in 2017) from Anton Kaplanyan.

You can modify shaders while testing the game.

Shader files are modular and annotated to setup the material editing gui and filter out mutually exclusive options. All shader permutation are compiled almost instantly from the asset processor and cached for later use.

You can create games that react to keywords entered in a designated Twitch channel and let streamers to invite targeted viewers into their game sessions on demand with ease.

It is still possible to use the non LTX version with few changes.

Built-in Lua editor with remote debugger to debug Lua scripts running in any device.

Optimized versions of assets can be streamed live to any device connected over the network.
This makes possible to implement asset types that hot reloads reducing drastically the time to test new content and little changes on device.

Multiple grain of control over any kind of engine setting and various kind of Lod systems. Settings can be grouped and applied in batch.

Perforce also comes with a free version for a limited number of team members.

Has skin shaders with subsurface scattering and weighted wrinkle maps, eye shaders with refraction parallax, hair with anysotropic specular reflections, etc.

A must for problematic things like hair , vegetation and scenes with complex solid transparent objects(es glass of water with ice cubes).

Special iteration of Temporal AA to battle the ghosting issue omnipresent in engines using other Temporal AA techniques.

It now works for both static models and animations and support advanced setups(es lods and physics).

Updated renderer pipeline to leverage the full spectrum of precision, luminosity and image processing features of the latest HDR tv.

Animation Spline editor supporting huge range of keyframing and tangent editing tools.

The UI uses the entity component system so it's fully modular and easily expandable. The UI is easily skinnable and supports border scaling images (scale 9). Powerful layouting system supporting multiple screen resolutions. Being based on the entity system every property can be fully animated.

It is elegantly managed in a separate entity context so it doesn't get messed up with other kind of entities and their components like in other engines, but it's fully decoupled communicating with entities in other context on specific event buses.

See here.