3D World

STEP BY STEP MAKE AN IN­TER­AC­TIVE SIN­GLE-COLOUR BACK­GROUND

- Tech · Redshift

01 SET UP THE HERO OB­JECT LIGHT­ING

To start, con­cen­trate on the hero ob­ject, and add a light­ing scheme us­ing Red­shift Lights. In this ex­am­ple, two Red­shift area light ob­jects are be­ing used. Both of the lights are par­ented to a cen­tral null. This al­lows the lights to be ro­tated in­de­pen­dently of the model. One of the lights, the key, is used to cre­ate a re­flec­tion on the screen. The other, the rim, high­lights the edge of the phone.

02 ADD THE BACK­GROUND EL­E­MENTS

Next we’ll add the Disc ob­ject which will act as a back­ground along with a Red­shift dome light. Add a Red­shift Ob­ject Tag to the Disc and in the Matte tab of the Prop­er­ties pal­ette, en­able Over­ride and then Show Back­ground un­der Gen­eral. Un­der Shadow, make sure that all of the three tick­boxes are en­abled. For the dome light un­der the Gen­eral tab, change the Tint to the back­ground colour de­sired, and then un­der the Ray tab, de­s­e­lect the Af­fects Dif­fuse and Af­fects Spec­u­lar tick­boxes in Con­tri­bu­tion.

03 IN­CLUDE A LIGHT FOR THE SHAD­OWS

Add a third Red­shift area light – this is to be used for the shad­ows on the Disc ob­ject. In the Ray tab, un­der Con­tri­bu­tion make sure that Af­fects Spec­u­lar is unchecked and in Scale in­put, a Dif­fuse Value of 0.0001 or sim­i­lar. This will make sure that the shadow light is barely con­tribut­ing any­thing to light­ing the phone. Still, it has no im­pact on the shadow qual­ity, which is con­trolled in the Shadow tab.

04 SET LIGHT PRO­JEC­TION

At the mo­ment, it may not look like the shad­ows are work­ing cor­rectly or at all, this is be­cause the hero key and rim light are light­ing the back­ground Disc ob­ject. To fix this, se­lect both the key and rim light ob­jects and go to the Project tab in the At­tributes pal­ette. Drag the Disc ob­ject from the Cin­ema 4D Ob­ject Man­ager list into the Ob­jects box. If the Mode drop­down is set to Ex­clude this will stop both of th­ese lights af­fect­ing the Disc ob­ject and the shadow light is now the only light cre­at­ing shad­ows.

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