Steps
- Set the end frame to your loop length (e.g. 240 frames at 25 fps).
- Key the first and last value of every animated property identically.
- Add a Cycles modifier to each F-curve and use linear interpolation.
- Light with an HDRI for realistic studio reflections.
- Render frames 1–239 (skip the duplicate last frame) and encode.
A slow camera dolly across an abstract studio, with rotating screens and pulsing light strips, is the classic news-opener background.
The loop math
For a rotation that loops over F frames, drive the Z rotation with #(frame / F) * 2 * pi. For a texture scroll, move the mapping by exactly one tile. Use the same approach for emission strength: #0.5 + 0.5 * sin(frame / F * 2 * pi).
Assets
Studio scenes look far more convincing with real reflections. A free studio HDRI (for example from the studio HDRI collection on 3D Valley) gives monitors and glossy desks believable highlights without placing dozens of lights.
Render settings
- Eevee is fine for abstract backgrounds; use Cycles with 64–128 samples and denoising for glass and metal.
- Output to PNG sequence first, then encode, so a crash does not cost the whole render.
- Add a little motion blur (shutter 0.5) so the loop does not strobe.