[Mark Doctor]

I’ve captured a screenshot with all the settings.

The Comp 1 is ray-traced. (6 samples sinds 20 samples didn’t matter)
The Comp 2 is classic-3D.

The only way to improve the ray-traced version, is by increasing the image scale and decrease the distance between image and the screen.

[Mark Doctor]

I Think your right. That means that i need to tile the floor with planks and create massive 3D plate. Then in material options select “appears in reflections only”.

Still I have developed the original idea a bit further. Because of the flexibility to automatically acquire the floor of a random footage. I wrote 4 expressions for the cornerpins:

Upper Left: thisLayer.fromCompToSurface([0,0,0])
Upper Right: thisLayer.fromCompToSurface([thisComp.width,0,0])
Lower Left: thisLayer.fromCompToSurface([0,thisComp.height,0])
Lower right: thisLayer.fromCompToSurface([thisComp.width,thisComp.height,0])

They all work fine and I also can use them als a preset for different purposes. But at a certain (steep) angle of the floor the expression gives an error message. Since I can manually drag the point-control to the desired position, I guess its got something to do with the size of the numbers to do the math, but not there outcome.

[Mark Doctor]

Thank you for your help. I’ve taken 4 screenshots:

top-left:
original scene with a 3D-shape.

top-right:
Creating a 3d-layer from the backgroundfootage and turn it 90° to create a floor.

bottom-left:
Skewing the image with the corner-pin-tool, back to its original state.

bottom-right:
New cordinates are needed for the corner-pin-tool, when the camera move’s. These need to be pinned down to the compositions corners.

[Mark Doctor]

Maybe I should put it this way. The backgroundlayer is rotated to Lean backward, to create a floor and I used the corner-point-tool to skew the image so it looks upright again. This works fine when everything remains static

But if i change the camera angle the skewing needs to be altered dynamically to the compositionscornerpoints

[Mark Doctor]

Thank you for your input.

That indeed would fake the reflection of the 3D-tablet into a floor. My curent problem is the fact that the floor isn’t reflected by the tablet.

So i needed to create a fake floor from the backgroundfootage to be reflected by the tablet.