The model in this scene is an attractive athletic dark-blonde, wearing a very nice short-sleeve, shorts-leg, khaki jumpsuit / bodysuit, with an explorer's pith helme. When we first see her exploring the woods she's wearing shoes, however these are removed before she takes to the deep mud (sensible, as shoes can trap people in mud, getting firmly stuck where a bare foot would slide smoothly out).
The main edited scene lasts 20 minutes, and features the model wading into the mud, rapidly sinking to thigh depth and then struggling onwards, the shorts part of her jumpsuit gradually getting messier and messier as she works her way out to a patch of mud she can sink in, where she then slowly sinks completely, including full submersion with her head below the surface. The mud appears to be a lake shore and is quite thick and viscous.
The lighting is good, cloudy-bright daylight.
Sadly, the scene is spoiled by terrible camera work. All of it appears to be hand held, even when the model is in her sinking location and hence not moving about at all, and at some points the camera is allowed to drift completely away from the model till she's out of frame almost completely, as if the videographer isn't actually looking through the viewfinder.
Once the main scene finishes, there's then 40 minutes of the uncut version, which adds lots more shaking camera work plus conversation and interaction between the model and the two crewmembers, and ends with the model's head and shoulders rising back out of the mud following her submersion. It also includes the model being helped to submerge by the second crew member who bounces her energetically in the mud, pressing down on her shoulders which she seems to quite enjoy! That section is also mostly fairly steadily filmed too. You don't get to see her climb fully back out however so don't really get to see her mud-drenched costume.
For me, a miss, the shaking camera makes it impossible to enjoy the scene.
DungeonMasterOne 9/13/11