Best Cloud Rendering for Lumion 4K vs 6K: Resolution Guide for Print & Screen
4K (3840×2160) is enough for screen presentations and websites. 6K (5760×3240) is only worth the extra cost if you’re printing large-format boards or posters. On iRender’s RTX 4090, a Lumion interior at 4K takes roughly 8–15 minutes. The same scene at 6K takes 18–35 minutes — about 2–2.5× longer and proportionally more expensive. Most architecture firms never need 6K. If your deliverable is a PowerPoint, PDF, or website gallery, 4K is the sweet spot: sharp enough for any screen, fast enough to keep cloud costs down.
| Resolution | Pixels | Render Time (est.) | iRender Cost (est.) | Best For |
|---|---|---|---|---|
| 1080p (HD) | 2.1M | ~3–6 min | ~$0.40–0.80 | Drafts, quick reviews |
| 4K (UHD) | 8.3M | ~8–15 min | ~$1.10–2.00 | Screen, PDF, website ⭐ |
| 6K | 18.7M | ~18–35 min | ~$2.50–4.80 | Print boards, posters |
| 8K | 33.2M | ~35–65 min | ~$4.80–8.90 | Large-format print only |
When Is 6K Actually Worth the Extra Cost?
Only when your image will be printed at A1 or larger (594×841mm). At 300 DPI print quality, 4K only covers about A3 size cleanly. If you’re producing competition boards, exhibition panels, or large client presentation prints, 6K gives you enough pixels. For A0 panels, you’d technically want 8K — but at $5–9 per image, most firms render at 6K and accept minimal softness at the edges.
If the deliverable stays on screen (client presentations, Instagram, website portfolio), 4K is indistinguishable from 6K. Rendering at 6K for screen delivery is just burning cloud budget.
How Does Resolution Affect VRAM Usage?
Higher resolution increases VRAM demand — 6K uses roughly 40–60% more VRAM than 4K for the same scene. A scene comfortable at 4K (10 GB VRAM) might push to 14–16 GB at 6K. On an RTX 4090 with 24 GB, that’s still fine. On a local RTX 3060 with 8 GB, 6K rendering can crash. This is another reason cloud GPU makes high-resolution rendering practical.
Disconnect when done — overnight idle = ~$65.
See more: Try Lumion at any resolution on a cloud RTX 4090 → Try Lumion at any resolution on a cloud RTX 4090 → View servers & pricing
Frequently Asked Questions
- Should I render Lumion at 4K or 6K for client presentations?
4K for screen presentations — it’s sharp on any monitor or projector. 6K only for printed boards at A1 or larger (300 DPI). Rendering at 6K for a PowerPoint or PDF is wasting 2× the cloud budget with zero visible benefit on screen.
2. How much more does 6K cost than 4K on cloud?
Roughly 2–2.5× more. A 4K interior costs ~$1.10–2.00 on iRender’s RTX 4090. The same scene at 6K costs ~$2.50–4.80. For a 10-image project, that’s the difference between ~$15 and ~$35. Only justified when the deliverable is printed at large format.
3. Can my local GPU render Lumion at 6K?
Depends on VRAM. 6K uses 40–60% more VRAM than 4K. A local RTX 3060 (8 GB) will likely crash at 6K on complex scenes. The RTX 4090 on iRender (24 GB VRAM) handles 6K and even 8K comfortably — which is the main practical reason to use cloud for high-resolution output.
Related post: Best Cloud Rendering for Architecture: SaaS vs IaaS Decision Framework
