1. Here's how
There are three different reflection types in Lumion:
- Planar Reflections: Very accurate on planar surfaces but renders slowly.
- Projected Reflections: Not very accurate on any surface but renders very fast.
- SpeedRay Reflections (Lumion Pro only): Mostly accurate on any surface & renders fast.
1.1: Assign a Standard, Water, Glass or PureGlass material to surfaces that you want to add a reflection plane to. You can also assign Reflection Planes to the built-in Water Planes, and those Lumion Materials that have standard material properties of Gloss and Reflectivity.
Please note that the following objects, effects, and materials are not visible in Planar Reflections due to a technical limitation:
- PureGlass and Glass Materials.
- Fountains, Smoke, Fire and Fog Effect objects.
- Lens Flares.
- SpeedRay Reflections or reflections from Reflection Planes.
- Hyperlight, Global Illumination and Sky Light Effects.
In Lumion 10 and older versions, the following are also affected by this technical limitation:
- The Ocean.
- Built-in Lumion Water Planes.
- Water and Waterfall Materials.
1.2: Add the Reflection Effect to a Photo or a Clip, or a Panorama Viewpoint to access the Planar Reflections function:
1.3: Click on the Edit button to add or remove Reflection Planes from planar surfaces in your Project:
1.4: Alternatively, you can click on the Automatically detect reflective surfaces and place Reflection Planes button which tells Lumion to analyze the camera view and pick the most suitable surfaces for Reflection Planes.
1.5: You can change the blurriness of a Planar Reflection by adjusting the Gloss slider of the affected reflective materials. A high Gloss slider value makes the reflections sharper and mirror-like and a low value makes the reflections blurrier:
1.6: Try to use as few Reflection Planes as possible.
- You can add up to 10 Reflection Planes per Clip, or per Photo, or a Panorama Viewpoint, or to the Entire Movie.
- Every time you add 1 Reflection Plane, Lumion has to mirror all models and render the entire Project once more, and this can very quickly become too slow.
- You should also try to check if there are Reflection Planes with no surfaces allocated (no green highlight) in the Scene. Or, the surface is so small from the point of view of the camera that the reflections are not worth rendering. If there are, click on the slot to remove the Reflection Planes assigned. Doing so will help to optimize your renders.
1.7: Adjust the Reflection threshold slider to change the distance at which parallel surfaces nearby will be included in the Reflection Plane. The further away a parallel surface is from the Reflection Plane, the less accurate the reflections will be.