Realistically Light and Render Interior Scenes using 3ds Max and Vray

Film Speed (ISO) – Determines the film power (sensitivity). Smaller values make the image darker, while larger values make it brighter.

Step 8

Now to place the various Vray lights. Lights 1-4 affect the scene directly, whereas light 5 has been placed in a downward direction, and will affect the scene in an indirect (in the
form of bounced light).

Step 9

The basic parameters of the Vray lights are:

Subdivs - Defines the samples, or the quality of the light. 8-10 should be used for test renders, and 15-20 for final renders. Increasing the samples will significantly increase your render time.

Step 10

IES stands for “Illuminating Engineering Society”. The photometric data is stored in these files. A photometric web is a 3D representation of the light intensity distribution of a light source. Web definitions are stored in files. Many lighting manufacturers provide web files that model their products, and these are often available on the Internet. We as artists can use them to replicate the real life phenomena of light in 3d.

Go to the “Lights” tab, choose “Vray” from the drop down list, and create a “Vray ies” in the right view. Then instance it below all four steel holders.

Step 11

The main settings for the ies lights are:

Power - Determines how bright the light will be.

Step 12

Through the following steps, you will configure the rendering settings in Vray. Press F10, then under “Global Switches”, uncheck “Default Lights”. This will cause the default lights in the scene to be switched off. For the Image Sampler type select “Adaptive DMC”, and “Catmull Rom” as the filter. Also, change the min and max subdivs as shown.

Lastly, change the “Color Mapping” type to “Exponential”. This mode will saturate the colors based on their brightness, and therefore, will not clip bright colors, but saturate them instead. This can be useful to prevent Burn-outs in the very bright areas (for example around light sources etc).

Step 13

Under the “Indirect Illumination” select “Irradiance Map” and use “Light Cache” as the primary and secondary engine. Also, change the Preset to “High”, “hsph subdivs” to 50, and “interp samples” to 20.

Hemispheric Subdivs (HSph. subdivs) – Controls the quality of individual GI samples. Smaller values makes things faster, but may produce blotchy results. Higher values produce smoother images.

Step 14

With a Light Cache, the light map is built by tracing many eye paths from the camera. Each of the bounces in the path stores the illumination from the rest of the path into a 3d structure (very similar to the photon map). In the Light Cache put 1500 for subdivs and 8 for no of passes.

The Subdivs determines how many paths are traced from the camera. The actual number of paths is the square of the subdivs (the default 1000 subdivs mean that 1 000 000 paths will be traced from the camera).

Step 15

Your settings for the test render are done. If you hit render now, you should see the same image that was shown before. Now all you need to do is apply the materials, and increase the Irradiance Map and Light Cache samples for the final render.

Step 16

Now to texture the scene (actually it’s quite simple). The basic parameters that will be used in materials are:

The shader for the tiles on the base is a simple vray material with a de-saturated texture in the diffuse and a noise map in bump.

Step 17

The wood rack is also made of a Vray material with slight reflections and glossiness.

Step 18

The material for the wall is again just simple cream and black colors with no reflections.

Step 19

The shader on the wall on which the paintings are hanging is made of steel and white wall. The wall part also has a grainy texture assigned to it.

Step 20

Your scene is now textured! You can add any other props or objects you like to fill up the scene. The above rendering settings are good for test renders, but for production quality you will need to increase the samples for the image sampler, Light Cache, and Irradiance map.

Step 21

Here is the final result! Hope you learned something new!!.