How to plan the effect of fog
You want a castle to look like an island in a sea of fog. The layer must be neither too high nor too low. Celeris lets you test which altitude works for the composition.
01Choose an elevated viewpoint
Find your viewpoint on the map and put the crosshair at the camera position. Tap “3D” with the cube icon at the top and let the terrain load. For a sea of fog, you need a view from above or along the edge of the layer.
02Set the landscape and light
Aim at your hills or castle. Choose a date and time for the light you want and set the focal length. You can then judge the fog inside your intended frame.
03Enable fog
Tap the cloud icon on the right. This enables ground fog and reveals its controls alongside. If they have collapsed again, open them with the small arrow beside the cloud.
Beside the cloud: the fog-top slider, then minus and plus for visibility. 04Vary top altitude and visibility
The slider with a metre value above it sets the top of the fog, in metres above sea level rather than above your tripod. Move it until your subject emerges. Minus and plus beside the second metre value adjust visibility and thus the layer’s density.
A manually adjusted fog layer leaves castles and hills standing like islands. 05Compare the limits and save
Try a slightly higher and lower layer. This shows when the subject disappears or the valley becomes too exposed. Save the plan and note the useful altitude range for comparison with weather reports.
Celeris simulates the effect of a fog layer you set yourself. It does not forecast whether fog will form or when its top will actually reach that altitude.