This week we looked at how to create a realistic CG composition, and apply this knowledge to our garage project.
Simply merging the asset to the background isn’t enough for a realistic CG comp. We looked at colour correction, as a way for the assest to blend into the scene more seamlessly. Splitting the channels to do this enables us to merge each channel and see the progess of the asset in the desired position. Nodes such as the shuffle and grade nodes contribute to colour correction of an asset.
We then looked at inputting smoke into the second room. This contained the rotoscoping we did and also working with the camera tracking we had learnt in previous weeks.
Work from home
To progress on our garage project, we now had to apply our knowledge of realistic CG composition and add some more assets to our scene.
I decided I wanted to add a tyre to the scene, leaning against the wall, as this would fit the theme of the scene. I downloaded a 3D model of a tyre, loaded it on Maya and started editing it slightly.
I made it slightly thinner and added spotlights coming from the direction the light is coming from in the scene. Then I made sure it looked okay on the render screen and rendered it out to an exr file to input on to Nuke.
I then placed this on the scene in Nuke, in my desired area I wanted it to be in.
I then had to track it to move with the camera. This was the most difficult part of this task this week as all prior ways I have done this didn’t seem to be working. After adding the tyre to the axis point I created a card on, and reading it through that, it tracked, however the positioning wasn’t right. After playing around with the card, the rotation and size I managed to get it to look right. However, the the tyre needs more colour correction and a shadow to blend. I added a grade node and adjusted some colour gradients, as well as changing the input to RGB instead of linearr, but it needs more focus on colour correction and shadowing.
I then used the same approach and template to add two posters on the walls. I decided to add mechanical posters to suit the theme, however these need shadowing as well. I have slightly changed the gain on the grade node of the white poster, as it is slightly out of the light, however the black poster seems to have the appropriate colours and light gain for where it is placed.