owlet is described as 'Owlet is a stanadlone, unbiased, physically-based raytracing renderer. It takes your 3D files in many formats, allows you to setup the scene and renders them using a high-quality raytracing renderer'. There are more than 25 alternatives to owlet for a variety of platforms, including Windows, Mac, Linux, Sketchup and Autodesk 3ds Max. The best alternative is Adobe Dimension. It's not free, so if you're looking for a free alternative, you could try LuxCoreRender or POV-Ray. Other great apps like owlet are Keyshot (Paid), V-Ray (Paid), appleseed (Free, Open Source) and RenderMan (Free Personal).
Adobe Dimension (formerly Project Felix and then Adobe Dimension CC) is the 3D design tool made for graphic designers. With extensive integration with Adobe Stock, you can easily composite 2D and 3D assets to build product shots, scene visualizations, and abstract art.
LuxCoreRender is a physically based and unbiased rendering engine. Based on state of the art algorithms, LuxCoreRender simulates the flow of light according to physical equations, thus producing realistic images of photographic quality.
The Persistence of Vision Raytracer is a high-quality, totally free tool for creating stunning three-dimensional graphics. It is available in official versions for Windows, Mac OS/Mac OS X and i86 Linux. The source code is available for those wanting to do their own ports.
V-Ray 2.0 for 3ds Max is a complete rendering solution, which combines the power of the well-known V-Ray award-winning production rendering engine with the flexibility and exceptional speed of the interactive rendering system V-Ray RT and the even more impressive new V-Ray RT...
appleseed is a modern, open source, physically-based rendering engine designed to produce photorealistic images, animations and visual effects. It provides individuals and small studios with an efficient, reliable suite of tools built on robust foundations and open technologies.
appleseed vs owlet opinions
pros, cons and recent comments
Owlet is more graphical, drag and drop. It is a windows programme not some text based Linux tech person. I want to get on with adding models (obj, fbx etc) to a scene and render it.