Back in may 09 Mr. Sameer Sahasrabudhe (Project Manager at IITB*,  Center of Excellence) contacted me for his work that requires help with Blender. I landed at Mumbai on 5th July. Upon arrival, I got his call, he asked me to come over to his house to discuss few things with his students Chirag and Nitin.

Continue reading “IIT Bombay – blender walkthrough”

Blender Tutorial – Creating a vase in Blender – part 4

Creating a vase in Blender

March 2005

Part 1: First crawls
Part 2: Modeling
Part 3: Material & Textures
Part 4: Scene Lighting

Part 4: Scene Lighting

  • Step-20 For lighting the scene we will add two more lamps. You can either add new lamp from the Toolbox [Space bar] or duplicate the original lamp. To duplicate first select the lamp then press [Shift+D] and move the duplicate object to desired position. Get in front-view [Numpad1] duplicate lamp once and move it down to nearly bottom of the original lamp.
Duplicating Lamp in blender
  • Step-21 In top-view [Numpad7], duplicate from the last duplicated lamp, move it opposite but equi-distance between Camera and the Vase. Keep it slightly off the straight line with the camera, as this lamp will be used for highlighting the side of the vase. Save your work.
Duplicating Lamp in blender
  • Step-22 If you render the scene now, you will see two bright spots on the floor, caused by the two duplicate lamps. We don’t want that and here is where Blenders ‘Layers’ feature comes in. The layers button are visible on the Menu-panel of the 3dView. Two layers will be sufficient for our scene, to add a layer keep pressed [Shift] and click on the second layer.
By default, we are always in first layer. Blender includes any layer that is active or layer button pressed in the rendering, just like any 2d paint program. Neat isn’t it!.

  • Step-23 Select the floor and the original lamp then press [M](move to layer), in the layer pop-up push the second layer button as you did in last step. Why you may ask that we are using more than one layer. Well Blender allows lamps to effect either ‘local’ layer or the whole scene, using this feature we can remove those two bright spots in the render. While we want the two duplicated lamps to affect the highlights of vase.
lamp in another layer in blender
  • Step-24 Select the original lamp and in ‘Shadow & Spot’ tab enable ‘Ray shadow’ to enable shadow generation, remember shadow casting should be enabled only for original lamp. Select any duplicate lamp, press [F5], in ‘Lamp’ tab click ‘Layer’ button also click ‘No diffuse’, repeat that for other duplicated lamp. Save your work now and if you wish to do the test render.
    Lamp properties in blender
  • Step-25 If you did a test render you can see the render with nice shadow. Blender has a GI or global illumination feature called, ‘Ambient Occlusion’ this behaves much in the way natural light behaves, i.e. it also takes into account light bounces among objects, and this makes the scene more realistic. But for some reasons this make its computation intensive so if you have slower processor you might have to sit for long time as the rendering completes.
    AO or Ambient Occulsion rendering in blender vase
  • Step-26 We will now go to World buttons to enable AO. Press [F8] and in the World buttons goto ‘Amb occ’ tab and enable the ‘Ambient Occlusion’. Here enable ‘Use distances’ and increase the ‘DistF’ value to 2.000. Press ‘Both’ button. Set ‘Energy’ to .80 and ‘Bias’ to .010. Render the scene. Most probably you will see noise in the rendering when it is finished. Depending upon your system capability you can increase the ‘Samples’ in AO tab. for this scene it was set to full at 16.
AO or Ambient Occulsion settings in blender
  • Step-27 Our work is ready for rendering. We just need to tweak the rendering options to get good results. Press [F10] and in the ‘Render’ tab enable OSA and increase the value to 8. The OSA or oversampling or anti aliasing make the jagged edges in the render smooth and increase the quality of the image. If you want to increase the size of rendering then go to ‘Format’ Tab and input the values manually. Also here you can change the format for saving the rendered image. After you are done press [F12] for final render. After rendering press [F3] to save the image, and remember to input the proper extension, as Blender does not add the extension automatically.
    Render settings in blender
The scene with AO enabled. The image textures and the source blend file can be downloaded from the downloads section.
The Vase rendered in blender

Happy Blending!

Blender Tutorial – Creating a vase in Blender – part 3

Creating a vase in Blender

March 2005
Part 1: First crawls
Part 2: Modeling
Part 3: Material & Textures
Part 4: Scene Lighting

Page 3 of 4

Part 3: Materials & Textures

  • Step-12 Now we are going to apply materials and textures to the vase and the floor. We will start with floor first. Select the floor in object-mode. Press [F5] to bring up Shading & Materials features in the buttons-window. Press ‘Add-new’ button to assign a material to the floor. As soon as you assign a new material the ‘Add new’ button gives way to ‘material name entry-box’ click it and type ‘Floor-mat’ for easier identification.Floor material in blender
  • Step-13 After assigning a material you can now add textures to it. For floor, we are going to add a wood image texture. Press [F6] , the Texture-buttons window opens. In ‘Texture’ tab click ‘Add new’ to add a texture channel. Immediately a ‘Texture-type’ drop down list appears from it select ‘Image’. Again a new tab called ‘Image’ tab appears next, click the ‘Load Image’ button and browse to the texture wood-tile.jpg, select it and press [Enter]. In Xrepeat: and Yrepeat: increase both values to 4.
  • Adding image texture in blender
  • Step-14 After adding the wood image texture, we will now modify the Shading parameters of the floor material. Press [F5] and got to ‘Mirror Transp’ Tab next to Shaders and press ‘Ray mirror’ and increase the ‘RayMir’ slider to .20. And finally Depth 3 (under Ray Mirror button), that’s all is needed for the wooden floor material.
    Adding specular reflection in wood blender
  • Step-15 Following the procedure in step-11 add a material for the vase. Then add three image textures namely vase-tex.jpg, vase-tex-spec.jpg and vase-deco.jpg in three different channels. You can rename the texture channels by entering text in the “Add new” box which by default will show Tex(#). Rename all of them suitably.
    The vase image texture in blender
  • Step-16 We had added three image textures for vase and now we will modify the shading property of the vase material. Press [F5], in ‘Shaders’ tab change ‘Ref’ (diffusion property) to .400, next change Spec (specularity) to 1.700 and Hard to 400 also Depth=3. ‘Lambert’ and ‘CookTorr’ are the algorithm’s user to calculate the diffusion and specular property of the textures.
    The vase shader in blender
  • Step-17 Now we need to give proper mapping values to the three texture channels. In the Texture tab(far right) you can see the three texture channels being visible. The ‘Map-input’ and ‘Map to’ tab will change the value of only the channel which is currently pressed(vase-tex). So to modify the properties of other channel you have to first select them. Go to ‘Map input’ Tab select Tube mapping for all three channels.
Texture mapping in blender
  • Step-18 In Tab ‘Map to’ the first texture channel need not be changed. For sec channel disable ‘Col’ and enable ‘Spec’ and ‘Emit’ buttons. Also, change the Var slider to .500.
Color Mapping in blender
  • Step-19 For the third and the last channel change the texture blending mode to ‘Multiply’ from the default ‘Mix’ and ‘Col’ value to .500. Try out the render now to see the materials you applied. Also, save your work now.
    Spec Mapping in Blender
Page 3 of 4

Blender Tutorial – Creating a vase in Blender – part 2

Creating a vase in Blender

March 2005

Part 1: First crawls
Part 2: Modeling
Part 3: Material & Textures
Part 4: Scene Lighting

Page 2 of 4

Part 2: Modeling

  • Step-1 By default blender 3dView already have some objects, a cube a lamp and a camera, you can press [F12] to see the default scene rendered. We don’t need the cube, it is already selected(pink) so go ahead and press [Delete], confirm deletion in the pop-up. To make the vase we will use ‘circle primitive’. To add a circle press [Space-bar] to bring up the toolbox. In it go to Add>> Mesh>> Circle, confirm the circle of 32 vertices.

  • Step-2 Now we will start editing the circle. You will notice upon adding the circle is in ‘edit-mode’ by default. First we will scale down the circle about 5 major grid units. To do that first press [S](scale) then keep pressed [Ctrl](Constrained movement) and bring the mouse towards the circle pivot, the circle will get scaled down in ‘jumps’. While scaling, you can see units or coordinates change in the menu bar. Yes the menu bar gives way to coordinate readings any time you move objects in 3dView.
  • Step-3 We will use extrusion for creating the shape of the vase. Press [Numpad1] to get into front view. Keep all the vertices selected(yellow, [A] to toggle), now press [E](extrusion) select ‘Region’ from pop-up and start moving the mouse upwards(Y axis). Just like the major grid jumps you can get smaller ones by complementing [Ctrl] with [Shift]. Now move it up to 1 small grid unit.

Tip: One small unit = .1000 in blender units or coordinates and one major([Ctrl]) is 1.000.

  • Step-4 Now we will enable Subsurf on our vase mesh. Press [F9] (Edit buttons), immediately you will see the buttons-window will change in options. Now in the buttons-window go to ‘Mesh’ panel and press Subsurf button to enable Sub-Surface. SubSurf increases the virtual count of the vertices, edges or faces in order to achieve smoother angles on the surface faces. Increase the value of ‘Subdiv’ to 2 on second spinner button.
Mesh properties in blender
  • Step-5 We also need to enable smoothing for the surface itself. In the same buttons-window go to ‘Link & Materials’ panel. Press ‘Set Smooth’ button. Press [Z](3dView Shading) once to get ‘solid shading’ in 3dView. The extruded circle or vase mesh will be shown in shaded mode.
MAterial settings blender
Tip: For free form view in the 3dView, press and keep MMB while moving the mouse.

  • Step-6 In the shaded-mode if you see any artifacts on the surface then, first select all the vertices by pressing [A] then press [Ctrl+N] to recalculate surface normals. Before proceeding get back to wire frame view([Z] again). You can now save your work.

  • Step-7 I am assuming that you haven’t changed the front view [Numpad1] and 3dView is in wireframe shading. If you had to go through the step5 then first unselected all the vertices by again pressing [A]. Press [B](box selection) the cursor will change to plus, drag and create a box around the topmost vertices in order to select them. Once selected we can proceed to extrude the vase surface.

Extruding in blender

Press [E] then [Y](Y axis) to constrain movement vertically, now move it .1000 unit upwards. Scale it down to .600. To scale the selection press [S] then move the mouse, click to commit scaling.

  • Step-8 No we have to complete the vase by 13 more extrusions. I am providing the extruding and scaling measurement for each step along with directions. Follow the method of extrusion and/or scaling procedure on them. Make sure you check the coordinates in the coordinate panel on the menu bar when you are moving the vertices.
1) .1000 extrude up, scale 1.300.
2) .1000 extrude up, scale 1.200.
3) .3000 extrude up, scale 1.300.
4) .4000 extrude up.
5) extrude and move up 2 big units([Ctrl]) and then .700 scale inwards.

Vase modeling blender
The image8 shows the result of first set of extrusions for our vase model.

Step-9 Up to now we had created the bulk of the vase, and we can see the process in the shaded view, by pressing [Z]. Before proceeding get back in wire frame view.

6) .2000 extrude upwards, scale .800 inwards. Next two extrusions will shape the ‘neck’ of the vase.
7) .2000 extrude upwards, scale .600 inwards.
8) .1000 extrude upwards.
9) .1000 extrude upwards, 1.400 scale outwards.
10) .1500 extrude upwards.
11) .600 extrude inwards, and lastly
12) .3000 extrude downwards.

Before proceeding get out of edit-mode by pressing [Tab].

  • Step-10 If you followed right your work will look something like in the image-9. We will now add a floor underneath the vase. Go to top-view [Numpad7]. Press Space bar goto Add>>Mesh>>Plane. Scale it up to 12 big units. Move the plane left 5 major units and up 5 major units. The modeling work for our scene is complete and you can view your work in rendering.
  • Step-11 Now we need to adjust the camera. Select it by right-click. Press [Numpad0] to get into camera view. Grab [G] camera, keep pressed the [Ctrl] and move the mouse downwards one time, the value in the coordinated should Dz 1.0000. This will bring the vase in full view of the camera. Press [F12] to see your modeled vase get rendered.Save the file now.
    Go to Next part –
    Part 3: Material & Textures

Blender Tutorial – Creating a vase in Blender – part 1

Creating a vase in Blender

March 2005

A vase tutorial in blenderPart 1: First crawls
Part 2: Modeling
Part 3: Material & Textures
Part 4: Scene Lighting

Page 1 of 4

Note: You should be aware of blender keyboard shortcuts. The keyboard shortcuts are written in uppercase just to highlight them, you should always replace them by lowercase letters.

Beginner level tutorial.

Vases can be a work of art. I had an ancient, beautiful vase in my home, which drew cries of admiration from everyone who visited our home. Then one day my big-brother toppled and broke it. Fortunately, the vase we are going to make in Blender is virtually indestructible.

Blender is very powerful modeling and animation package and have very efficient workflow, combination of keyboard shortcuts and the UI make that possible. Modeling the vase in Blender is pretty simple, and we are going to take you through the steps to create it. For this lesson we will be using Subsurface modeling. Before we begin lets first explore the Blender interface a bit.

Part 1: First crawls

The main interface component in Blender is called a ‘window’. Each feature in Blender has it own window. The window is highly configurable in fact you can change any ‘window type’ to another just by selecting the ‘window type’ from the menu bar. Blender uses ‘windows’ as interface for all feature sets, like the 3dView or workspace, buttons window (this window houses context sensitive tool & options for the 3dView) and all other. Each window can be identified by the icon at the left most part on the menu-panel, for example here how the icons for 3dView  and buttons window look like.

Blender uses the mouse cursor as the focus point so all the pop-ups will be at the cursor position. In 3dView there is an insertion cursor, any object added to the 3dView will always be at the current insertion cursor position, left click positions the insertion cursor to desired location.

Blender have two modes of working, Object-Mode and Edit-Mode. In ‘edit-mode’ you can modify the shape of the model by manipulation its edges, vertices or faces. To get into ‘edit-mode’ first select the object(right click) then press [Tab], press Tab again (toggle) will bring you back to ‘object mode’. In ‘edit-mode’ you the vertices are shown as dots, yellow if selected pink otherwise.

Every object have its own pivot point shown by a pink dot, all operations like rotation, scaling and movement act on the pivot point. Right click is used for selection either objects in ‘object-mode’ or editable vertices, edges or faces in ‘edit-mode’.

By default the ‘Ray-tracing’ is disabled in Blender. Press [F10](Scene) go to buttons window and on ‘Render’ panel enable ‘Ray’ button. That’s about the very basic primer for your entry into blender world. We will now start on your next masterpiece.

In Blender dragging requires first ‘grabbing’ the object. To grab the object select it with right click then press [G] to grab. The accompanying images will have the setting and options highlighted with light blue wherever possible. Whenever we mention ‘Panel’ it always means the option panel in the buttons window. In the pop-ups you can either press ‘Enter’ or click to make a selection.

Page 1 of 4
2005 © Copyright Gaurav Nawani

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