The main thing I like is the rendering speed. I work in product design, so it is very useful to get a render quickly. The interface is intuitive, which makes the software easy to use.
LT is a very easy to use and intuitive render engine. Not nodes sht or complications, just open your 3D model, assign materials, lights, camera and action! It easily beats the corporate greed of KeyShot with an all-in-one application. HDRI environment edition, animation (still basic but improving) and a very accurate natural light interpretation. It is perfect for product visualization. Since it is GPU based, the rendering speed is fast and the developers have improved it recently. I use it in two different computers, one has an Nvidia A3000 and the renderings are very fast. My other computer has an Nvidia 3090 and the renderings are almost instant. Videos are also fast and easy to set and control. I can open Rhino files and SolidWorks assemblies directly in the application, no need of converters, integrators or other middle-mad software. Another part that I love of LT is that the developers are close to the users, they listen to recommendations, feature requests and are quick to troubleshoot any issue. Good luck finding that with KeyShot.
I like that I can use it with my Radeon 7900 XTX and 9070 XT GPUs. And AMD GPUs in general, which I prefer to nvidia GPUs because of the better value in terms of performance per cost. The interface is straightforward and intuitive. Most operations have visual controls and indicators and you can just drag and drop model files into the viewport and it will automatically import them. The software copes very well with my 3D pipeline. It is able to import very large .OBJ files which are derived from my CAD modelling. I use the software to render my CAD designs by exporting very high polygon count .obj or .fbx models of my CAD designs and importing these into LightTracer. It also supports importing CAD models directly, natively. It has a nice library of free materials built in and quickly and easily downloadable and applicable with no extra cost. The performance is quite good, even on GPUs without very good hardware ray tracing performance. I've used this software for years with a pretty weak GPU before my current setup. I also like the perpetual license model which is provided with Light Tracer as I like to actually own the software I use rather than pay for it as a service. The price is quite fair, especially for the perpetual license. The developers are helpful and responsive to questions and feature requests, through their Discord server, and have routinely implemented features previously requested by users. The software is under continuous development. It supports a large number of polygon mesh 3D formats and files. Such as GLB, FBX, OBJ, STL and many others. And it is also able to import actual native CAD models and conver them to polygon meshes internally, upon import. It has an AI denoiser for users without nVidia GPUs but can also use proprietary nVidia denoisers as well. It's Vulkan based so it's hardware vendor agnostic. It's the only tool of its type which I am able to use with the hardware and other software available and affordable to me. I use it alongside Autodesk 123D Design, Moment of Inspiration 3D, freeCAD, CAD Exchanger and Unreal Engine's Datasmith tool.
Light Engine develops first-class 3D rendering software to help you take the best out of your 3D models, reducing time and efforts, and to publish your artwork on the web.