Today, we have finally entered post production at last! I started the day by assigning tasks for my group members to complete, Joseph to start keying out the actor for the staircase shot, Guo Wei to find and destroy cars (digitally of course! :O), Richard to create a fractured wall for the post apocalypse shot, and Shaheed ro encode all the footage properly and search for statue 3d models of mythical creatures. Most of them managed to complete their tasks, Guo Wei was initially assigned to look for wrecked cars, but no free ones could be found, so he downloaded a car model and wrecked it himself!
After that, I undistorted the footage in Nuke before exporting them to be used in Maya. Many ways were tried before arriving at a solution. Using both Image and Line Analysis resulted in a stretched imaged, while using Grid Analysis resulted in a severely warped image. In the end, I had to eyeball it and try to undistort it manually.
I spent most of today morning and afternoon trying to match the CG camera in my scene to the actual camera. It was so much more difficult actually doing it than watching Mr Leong match it in 5 minutes.....
The reason why I spent so long matching it was that even though I matched the ground plane perfectly, but when the steps were created, they did not match up at all! And that's how I ended up spending half a day trying to match the perspective of the 3d step to the footage. Later I realised I could create a plane and use it to match the wall as well, giving a better perspective match for the camera. After this was done, I then proceeded to create the detailed version of the step geometry and translating them. At this point, they steps matched up reasonably well, but it was still not a perfect match. I then decided there was no choice but to move the vertices of the steps on a per-object basis to get them to match up perfectly. This discrepancy was probably due to the fact that the bricks were laid by men, and hence were not perfect. Once the perspective was matched, all the modeling went smoothly after that. Earlier in the day, I went to the locations to take measurements of all the objects that would be important/need to be modeled. This helped me tremendously as I did not have to eyeball the objects and estimate their dimensions.
Today, I learnt how to use the ambient occlusion material in mental ray from Mr Pang, it was practically just a click away! Mr Leong also taught us how to match the CG camera to the real camera, and how to do stitching of UVs, previously we just left them as they were after mapping the UVs. I also learnt how to undistort footage using the LensDistortion node in Nuke.
After watching Source Code, I am extremely motivated to make the shots both photorealistic and appealing!! Apparently almost all of the train ecterior and station was CGI!! And what's more, no one noticed at all!!!
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