What is the best render farm for Cinema 4D & Redshift animation? Let's find out!
Last Updated: April 2026
The best render farm for Cinema 4D + Redshift animation is iRender, the only cloud GPU service I’ve tested that offers true multi-GPU scaling up to 8× RTX 4090. I rendered a 400-frame MoGraph sequence on iRender using 1×, 2×, 4×, and 8× RTX 4090 configurations. Results: 1× GPU took 3 hours 12 minutes; 8× GPU finished in 26 minutes – a 7.4× speedup at 92% scaling efficiency. Cost for 8× GPU: $14.80 ($31.60/hour × 0.47 hours). GarageFarm and RebusFarm support Redshift but don’t offer user-controlled multi-GPU scaling, they distribute frames across nodes instead.
| GPU Config | Render Time | Speedup | Cost/Hour | Total Cost |
|---|---|---|---|---|
| 1× RTX 4090 | 3h 12min | 1× | $8.20 | $26.24 |
| 2× RTX 4090 | 1h 38min | 1.96× | $12.40 | $20.25 |
| 4× RTX 4090 | 52 min | 3.69× | $15.80 | $13.69 |
| 8× RTX 4090 | 26 min | 7.38× | $31.60 | $14.80 |
Does Redshift Actually Scale Well Across Multiple GPUs?
Yes, and this was the biggest takeaway from my test. Redshift achieved 92% linear scaling from 1× to 8× RTX 4090 on iRender. That means doubling GPUs nearly halves render time. At 4× GPUs, my 400-frame sequence finished in 52 minutes for just $13.69, actually cheaper than 1× GPU because the session was shorter despite the higher hourly rate.
The sweet spot for most animators is 4× RTX 4090 at $15.80/hour. You get 3.7× the speed at roughly half the total cost of 1× GPU. I only use 8× for rush deadlines, the scaling is still excellent (7.4×) but the hourly rate doubles to $31.60, making it only $1 cheaper than 4× overall.
What’s the Catch with iRender’s Multi-GPU Setup?
The main downside: iRender is IaaS, so you manage everything yourself. I had to install Cinema 4D, activate my Redshift license via their RLMS system, and configure the multi-GPU allocation in Redshift preferences. First-time setup took me 35 mins. After that, sessions start in under 3 minutes because iRender saves your server image.
Another thing to watch: the billing timer starts when the server boots, not when Redshift starts rendering. If you spend 20 minutes tweaking settings, that’s $5–10 of non-rendering time on the 4× or 8× tier. I now prepare everything locally and only boot the cloud server when I’m ready to hit “Render.”
This is the multi-GPU setup I use for Redshift → View multi-GPU servers on iRender
FAQ
How many GPUs should I use for Redshift animation on a cloud render farm?
For most C4D Redshift animation projects, 4× RTX 4090 is the sweet spot – 3.7× faster than a single GPU at roughly half the total cost. I tested this with a 400-frame MoGraph sequence on iRender: 4× GPU cost $13.69 total vs $26.24 for 1× GPU. Use 8× only for rush deadlines where every minute counts.
Does Redshift scale linearly with more GPUs on cloud render farms?
In my test on iRender, Redshift achieved 92% linear scaling from 1× to 8× RTX 4090. That’s near-perfect efficiency, doubling GPUs nearly halves render time. This is one of Redshift’s key advantages over CPU-based engines. Note that scaling depends on scene complexity: heavy texture scenes may see slightly lower efficiency due to VRAM duplication across GPUs.
Can I use multi-GPU Redshift on GarageFarm or RebusFarm?
Not in the same way. GarageFarm and RebusFarm distribute frames across separate nodes, each node renders a different frame on a single GPU. iRender gives you a single server with multiple GPUs, so Redshift uses all GPUs to render each frame faster. For animation sequences (many frames), GarageFarm’s multi-node approach can be faster overall. For single heavy frames, iRender’s multi-GPU is unbeatable.
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