What are some alternatives?
When comparing Clara.io and Mitsuba, you can also consider the following products
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Keyshot - KeyShot 3D rendering and animation software is the fastest, easiest way to create amazing, photographic visuals of your 3D models. Enter your search in the box aboveTryYour download of KeyShot is only moments away.
Cinema 4D - Cinema 4D is a 3D modeling, animation, motion graphics and rendering application.
V-Ray - Learn why V-Ray for 3ds Max’s powerful CPU & GPU renderer is the industry standard for artists & designers in architecture, games, VFX, VR, and more.
MODO - Modo by Foundry brings you the next generation of 3D modeling, texturing and rendering tools in a powerful integrated software package.
POV-Ray - What was then called STAR-Light, and later renamed to PV-Ray and ultimately POV-Ray, has therefore been on this planet for a whopping 9, 190 (or 11, 000) revolutions by now (plus another guesstimated 150 above it).