Miniature or practical element placed between camera and main set — creates depth and integrates VFX practically without heavy compositing.
You place a miniature model or a practical object directly in front of the camera — between it and the main scenery — achieving an optical integration that requires little post-compositing work. The foreground model functions like an optical illusion in real space: spatial depth is created by physical proximity to the lens, not by digital effects. A damaged door frame in the foreground, a broken lattice, a scorched metal plate — anything can serve as a foreground model and immediately lends authenticity and dimension to the scene.
Practically on set, it works like this: You mount the model on a separate rig or a boom that leads out of the frame or is moved via motion control. Depth of field is crucial — often, small apertures or selective focus are used to integrate the foreground model into the spatial hierarchy. A common mistake: the model looks too precise, too clean. Dust, scratches, wear — authentic patina helps to blend it with the environment. For VFX shots with CGI elements in the background, you save yourself subsequent layering work and keying problems because the physical depth makes the green screen setup unnecessary or minimizes it.
The efficiency lies in hybridization: you combine practical effects with digital space without having to separate them. A destroyed spaceship interior — foreground models of the dented wall in focus, with live-action or CGI environment blurred behind it. The viewer immediately perceives that they are in the room. This technique was particularly used in the 1980s and 90s before compositing software became so complex. Today, it is no less valuable — it reduces render time, improves optical credibility, and gives the DoP more control over the final visual language.
Important: Scales must be consistent. A 1:20 scale foreground model in front of the camera cannot be combined with a 1:50 model in the real space — the perspective distortion will be immediately noticeable. Motion control is your friend here if the foreground model is meant to move. And always: the materials and surface finish must match the main set, otherwise the lighting will reveal it.