The Nuke 3D Engine - Nuke 101: Professional Compositing and Visual Effects - page 393

This will be your texture. You just need to connect it to the cube geometry.
6. Connecttheinput(calledimg)ofCube1totheoutputofCheckerBoard1( FIGURE
9.12 ) .
Figure 9.12. The texture is normally connected to the img input of the geo-
metry.
7. To see your handiwork, switch the Viewer back to the 3D Viewer by hovering
your mouse pointer over it and pressing the Tab key.
8. Select Cube1 and with the cursor over the Viewer press the F key.