Lumion has several different light sources. This article is understandable for first time user.

Sun

• As sun is light source so it causes shadows.
• Environment tab can controlled the default position of sun in build mode.
• North direction, latitude and longitude are offered by the Sun study effect.
• It also can override the environment setting by adding the sun study effect in mode.

Spotlight

• Spotlight emanate from any point. It also causes shadow.
• Spotlight is cone of light.
• Spotlight can set the brightness as default at 300.
• Using the object tab mode and move mode we can also modify the color, change the brightness.
• Spotlight can be ideal for can lights, pendant lights and lamps.
• Global Illumination effect calculated that spotlight is the one and only artificial light source.
• “Show light source” option also available in this spotlight mode.
• With node placement option spotlight can be placed accurately.

Omnilight

• Omni light is a light source. It can reflect light from all directions. It also brighten all surfaces.
• It can’t make shadows at all.
• It also can set the brightness as default at 500.
• By using object tab we can change the color and brightness.
• Omni light also project light through walls. “Light leakage” can also be controlled by adjusting the brightness mode.
• When we’ll soften the scallop effect it will be ideal for that moment.

Light fill

• It can cast light from all the directions. It also brighten the front and back of all surfaces.
• It does not cast shadow either.
• Light fill can set the brightness as default to 1500.
• There is an object mode option here and we can set the color and brightness of light by using it.
• Light fill would be ideal to force the light in dark area.
• Light fill can project light through walls and light leakage can be controlled by adjusting brightness mode.

Area light

1. Area light is a rectangular light source. It can cast light from one direction only.
2. The advantage of area light is that it can brighten all the surfaces of walls and it can’t make shadows.
3. It can set the brightness to 50.
4. By using object tab, move mode and edit properties we can adjust brightness and color.
5. Area light is ideal for pushing light into space.
6. It also projects light through walls and we can adjust the light leakage by set the brightness mode.
7. One more available option is here. It is called as “show light source”.

Line light

• It is also rectangular light show and it does not make shadows.
• It can set the brightness to 1000.
• Line light is ideal for back-lighting televisions, art and cove light also.
• “Light leakage” and “show light source” are very useful options available in line light mode.

Emissive material

• It is made of glowing material, and it casts as a glaring light source also.
• It will not cast light if it has not one pixel of visibility.
• It is ideal for stimulating glowing light also.

Lighting strategy

There are two strategies. One is accurate lighting and the second one is artistic lighting. To get the light source you must follow the instructions. Lumion light source is idea if it is used as combination of accurate lighting and artistic writing.

For more information, please watch the video tutorial

Source: Architectural Expert

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SketchUp Shadow

We’re going to start by turning on SketchUp shadows – these will give you a preview of what the actual shadows will look like within your model. You can adjust some time of year and also time of day settings to urge your sunlight where you would like.

If you’ve already applied materials to your model, you’ll activate a cloth override within the settings section. This will override your materials to whatever colour you have set. In this case, for simplicity’s sake, you can also not placed glass in the windows. To exclude a glass material from your material override, you’ll adjust that using the fabric settings in your Vray Asset Editor window.

The first thing you’ll notice is that your render may be a bit dark. We are going to adjust this by going in and adjusting the camera settings. You can find these within your Vray Asset Editor window, under the settings tab. One thing to note – whenever you have an interior render that isn’t bright enough, it’s a good idea to start by adjusting your exposure rather than making your lights brighter. This becomes especially important when handling artificial interior lights, otherwise, your lighting calculations start becoming unrealistic.

Camera in V-Ray

In Vray, the camera acts a lot as a camera would in real life the shutter speed or exposure value is going to affect how bright your image is. The lower the worth, the brighter the image are going to be . You can either just adjust the exposure value, or there are more advanced settings if you click on the advanced settings button. We are going to set our exposure value to 11.

Note that this makes your image noticeably brighter. However, you would like to form sure that you simply don’t increase exposure or brightness such a lot that you image becomes blown out.

You can check this by clicking the button for “force colour clamping.” this may indicate on your image where the super bright areas are. In this case, you can see how we’ve brightened our image up so much that we can’t see our sky or our ground plane anymore. We can reduce the brightness of our sun to .5. Now you will notice how this reduces the blown-out areas in our image. Our shadows are also looking a bit too straight – very unrealistic. To create more soft, rounded shadows, enter your sunlight settings and adjust your sun size – during this case, we’ll set it to three.

If we want to do is create an artificial light that will push more light through our window?

Rectangle Light

To do this, we are going to use a rectangle light outside our windows. A rectangle light is a light in Vray that casts light. You can extract a rectangle light using the lights toolbar within Vray. Simply place it outside your window, we can scale it so that it covers both windows.

You will notice, that when we place this, we can no longer see our sky, which is not what we want, so we are going to go into our light settings and under options, select the choice for invisible. This means that the sunshine is going to be cast without the particular geometry being rendered.

Note that you may have to make some adjustments once you turn your materials back on, it should be fairly easy for you to achieve the results that you’re looking for.

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