A (visibility sampling) can be correlated.Logical formLearned from2 sentences. Persons may introduce a notion of (visibility sampling).Logical formLearned from2 sentences. (Visibility sampling) may consider visibility.Logical formLearned from2 sentences. (Importance sampling strategies) can be for illumination.Logical formLearned from2 sentences. Frequencies may permit sampling of the atmosphere from a surface.Logical formLearned from2 sentences. Some types of (sampling designs) can be employed.Logical formLearned from2 sentences. (Surface roughness sampling results) may include a (summary table).Logical formLearned from2 sentences. Sampling may be performed on sites.Logical formLearned from2 sentences. A range can be constituted-of-or-filled-with sampling.Logical formLearned from2 sentences. A sampling can be synchronized.Logical formLearned from2 sentences. Samplings can be in a (time period).Logical formLearned from2 sentences. Systems can be for sampling of cores.Logical formLearned from2 sentences. A requirement can be for (compliance sampling).Logical formLearned from2 sentences. A (compliance dust sampling) can be underground.Logical formLearned from2 sentences. Responsibility can be for some (compliance dust sampling).Logical formLearned from2 sentences.