<< Back

Modelling lesson 2 -- Lights and illumination

Lights are essential objects in the scene, because without them nothing would be visible.

Lamps are inserted as separate objects by Shift + A >> Lights .
The brief explanation of light types is included in this video:
Blender offers four types of lamps -- point, spot, area and sun. The detailed description of each type and its settings may be found in the official reference manual:
link Light objects

In practice, the lamps are used to create realistic illumination of a certain object. In such case we use three types of lights: An example of such illumination may be found in the following video:

As we have seen, lamps affect the scene locally, i. e. the illumination depends on the position/direction of the light. However, Blender also offers global settings for illumination, which are introduced in this video:

Focus on the parts about ambient occlusion and bloom. The parts about depth of field may be omitted. Also, the parts about subsurface scattering and screenspace reflections are subject of the materials lesson, so they may be omitted for now.
Also it is useful to learn about output settings at the end of the video. These will be needed for creating renders for your projects.

The last part of the lesson is the presence of shadows which are casted by light sources. The shadows offer several settings which are described in the following part of the manual
link Shadows

The shadows are set globally and the settings are adjusted in the rendering tab:
shadows
 

Assignment -- Light sources, shadows

Aim

The aim of the assignment is to link your theoretical knowledge with the tools of the 3D modelling software Blender. The assignment is the result of the activity on the online lesson.
The first topic covers light sources and shadows.

Modelling in Blender

Create a simple scene with several objects (e.g. sphere, torus, teapot, bunny etc.) and a plane, which serves as an underlay to these objects.

Each object has its own base color (set in Materials tab). The objects do not have to be textured.

Document structure

You will create a (.pdf) file with several dozens of figures. Each figure is described by few sentences describing the settings of a certain parameter, property or a object. Also, explain and show (if possible) the main principle, how the parameters are computed, or how they affect the scene.

Please, use separate figures (rendered images) and descriptions for each change of the settings of the scene.

Example:

example

Now the scene contains only one spotlight with the apex placed above the cube. The beam is characterized by the circular cone, with following parameters:




What has to be included and discussed

The front page -- includes the name of the project, your name, study program and academic year.
Types of the lamps (light sources)

Shadows -- describe the parameters of the shadows in the render settings, discuss how the parameters affect the softness of a shadow
Ambient occlusion -- show and briefly describe how the parameters affect the lighting in the scene
Bloom -- show and briefly describe how the parameters affect the lighting in the scene. To achieve this create a scene with several objects, where one of them is blooming
Several lamps in the scene -- use different settings for each lamp and shadow, show and explain, how these setting affects the scene. You may follow the three point lighting tutorial from the lesson

Submission rules

Your (.pdf) file together with the original Blender file(s) (.blend) are compressed into a (.zip) archive and submitted using the following form:
file_upload Submission form

The deadline is set to 14 June 2020 or 3 work days before the exam.

DO NOT COPY – PARAPHRASE!