Which render engine
for diamond / jewellery?
For a diamond / jewellery scene, the recommended engine is Octane, with V-Ray as the alternative. Spectral unbiased rendering: dispersion (the diamond's fire) is physically computed, not faked. Sharp caustics and coloured highlights on the facets are out of reach for biased engines.
Pick the material, set your production constraints: each engine gets a score, with the verdict, a credible alternative and the key settings for a luxury 3D film.
01 — The scene
Octane
V-Ray
V-Ray
Arnold
Octane
Redshift
Arnold
Octane
Arnold
Redshift
Redshift
RedshiftWhy this engine
Spectral unbiased rendering: dispersion (the diamond's fire) is physically computed, not faked. Sharp caustics and coloured highlights on the facets are out of reach for biased engines.
Key settings · Octane
- →PMC kernel for caustics
- →Dispersion through the spectral IOR of the specular material
- →High-contrast studio HDRI, no soft area lights
Why not the others
- V-Ray — Precise and versatile, but slower iterations than Redshift and less character on organic materials.
- Redshift — Biased: very fast, but less accurate on dispersion and fine caustics.
- Arnold — The reference for organic materials, but slower on complex refraction and tight deadlines.
These recommendations come from fifteen years of 3D films for luxury houses — fragrance, jewellery, watchmaking, beauty. The score always starts from the material (what the physics of the scene demands), then adjusts to production: still or animated shot, deadline, output resolution and available hardware. Speeds are relative and qualitative: they depend too much on the scene to be quoted honestly as numbers.
- Karma XPU — Houdini’s engine, hybrid CPU + GPU, declared production-ready since Houdini 20. Relevant when simulation (fluids, volumes) and rendering live in the same Houdini pipeline.
- Cycles — Blender’s path tracer, CPU and GPU. A solid option for studios producing in Blender.
- Unreal Engine — Path Tracer — Unreal’s path tracer, considered production-ready since Unreal Engine 5.5. Interesting for sets and environments, to be validated case by case on luxury’s most demanding materials.