Thursday, 13 January 2011

green screen

When we started to do our green screen we didn't really plan out properly what and how we was going to being able to fit the rule of 3rds (but we used 4) into the screen 4 times because on the editing on the mac's we couldn't use the same shot playing over because we needed the lyrics 4 times from 4 different shots, so when we first did our green screen we realised this and had to do it again, but with this time as well we noticed that because it was being green screened onto a dull back ground the images of the protagonist being used had to be a image of him that stood out not a t-shirt that would blend into the back ground. We did this but on doing so the clothing worn by the protagonist was a white t-shirt and because of the lighting on the green screen in made the protagonist looked almost see through when we came to green screening it on the mac's. so what but we didn't have time to change the clothing and film again, so between contrast on lighting and the back ground on the other shot we are green screening over we managed to sort the the effect out, also by using the cropping tool on the mac, enabled us to crop the picture just to the person with no back ground because on the green screen there was creases which meant that that you could tell on the shot so we managed to crop them out. by using this tool it was easy as well to fit 4 of the images of the protagonist on the screen so you couldn't tell from the layered affect. When we was doing the green screening we came across a few problems like the fact the green screen was wide enough so that when we was putting 4 imaginations of the protagonist along the screen it was cutting it fine either side because the camera as well was a bigger picture when we put it on the mac from when it was actually filming, so we had to mark out along the floor where he could stand in the shot four times with out over lapping. also another thing that we was faced with was the lighting causing to much shadow on the green screen so that when i moved you could see a Shadow which would cause bad continuity editing, so we had to try and position the lights so one would counter out another in terms of reflecting onto the green screen we tried over head lighting and from different angles as well as head height and lower angled lighting to try and see which would cause no shadow or the least shadow and we found that using one over head light and 3 head height lights worked from this diagram you can see where they were positioned and the over head was side lighting b number 1, this was the most effect shooting we did as it meant that we could put the images on with out a shadow at all really.

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