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ALS technical notes: Difference between revisions
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→ALS glass effect
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The glass effect is primarily intended for interior views. In particular, no external fog or haze is rendered for the glass, i.e. if the effect is used in an outside view, it is the responsibility of the aircraft modeler to take care (e.g. with LOD settings or range animations) that no problems in bad visibility occur. | The glass effect is primarily intended for interior views. In particular, no external fog or haze is rendered for the glass, i.e. if the effect is used in an outside view, it is the responsibility of the aircraft modeler to take care (e.g. with LOD settings or range animations) that no problems in bad visibility occur. | ||
=== Why a separate effect for glass seen from inside? === | |||
Basically because the two situations are rather different. Slight dirt on the glass against the background of the sky from inside is rather prominent, against the background of the cockpit seen from outside it is not. Visuals from inside are dominated by Mie forward scattering of light, leading to a bright glare effect when looking at dirt, frost, fog or scratches close to the sun. From outside, reflected light rather than transmitted light is dominant. The reflection of any external object on the outside of the glass changes as the aircraft moves, this is not the case for the reflection of the cockpit in the glass seen from the inside. | |||
The viewing situation is also different. From the inside, we usually do not focus the eyes on the plane of the glass but look through it, from the outside the focus of the eyes is often close to the glass surface. For something half a meter before the eye, we also need to apply a lot more resolution and details than for an object typically seen from 10+ meters from the outside. | |||
Add to this that atmospheric fog is never relevant for glass seen from inside but for glass seen from outside, and it suddenly makes sense to use a different effect. | |||
The recommended effect for glass surfaces seen from outside is model-combined-transparent.eff. | |||
=== Rain === | === Rain === | ||