I wanted to see what the quality difference looks like between IPB and All-Intra so did some shots from my office window. Original 1080p H.264 file here: mediafire.com/?k3m6ahippurvbxw

These are done using the 12-35mm f2.8 and with white balance set to auto on a PAL GH3. The focus point is on the silver VW in the middle left in all clips. I used a Phottix variable ND filter which I bought recently to open the aperture up to f4 for the second half. With the auto white balance (forgot to set this properly) you can see a colour shift with the Phottix on.

I assembled these clips in After Effects and didn't apply any effects other than the sharpening filter which I cycled on and off. Testing with noise reduction eliminates the fine noise in the shadows although I've left that out in this render. I've rendered an H.264 at 20mbps but there is still some detail loss over the original footage...

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