Monday, July 23, 2012

Capacitor.

Hello,

3D models of the following had been made in Blender 2.49 version for Project OSCAR 3D model Repository and were rendered in Blender Internal Render engine.

I have re-done the material and lighting of these models in Blender 2.63 version and rendered with Cycles render engine.

 
A capacitor (originally known as condenser) is a passive two-terminal electrical component used to store energy in an electric field. The forms of practical capacitors vary widely, but all contain at least two electrical conductors separated by a dielectric (insulator).

Previously done in Blender 2.49

In one half i kept the color as blue and on the other was black. Below you can see the before and after rendered images.

Material setting for pins
Final Renders in Blender 2.63 Cycles render Engine


Resistance Box

Hello,

A box containing a number of precision resistors connected to panel terminals or contacts so that a desired resistance value can be obtained by withdrawing plugs (as in a post-office bridge) or by setting multi contact switches.

3D models of the following had been made in Blender 2.49 version for Project OSCAR 3D model Repository and were rendered in Blender Internal Render engine.
I have re-done the material and lighting of these models in Blender 2.63 version and rendered with Cycles render engine.


Blender internal render 2.49



Brass material setting 
Roughness is 0.286



Final Renders in Blender 2.63 Cycles render engine.



Rheostat.

Hello,

3D models of the following had been made in Blender 2.49 version for Project OSCAR 3D model Repository and were rendered in Blender Internal Render engine.

I have re-done the material and lighting of these models in Blender 2.63 version and rendered with Cycles render engine.
 
Rheostat, adjustable resistor used in applications that require the adjustment of current or the varying of resistance in an electric circuit.. Its resistance element can be a metal wire or ribbon, carbon, or a conducting liquid, depending on the application.

UV unwrapping has been done to get the copper coil effect.

Done in Blender internal render 2.49
Cooper coil image texture







Blender cycles render 2.63




Wooden Bridge.

Hello,

3D models of the following had been made in Blender 2.49 version for Project OSCAR 3D model Repository and were rendered in Blender Internal Render engine.

I have re-done the material and lighting of these models in Blender 2.63 version and rendered with Cycles render engine.
 
Simple UV unwrapping for the wood texture and shiny silver metal material for the upper part.
 I like the before image more as the wood texture is more realistic.Below you can see the before and after images.

Previously Done Blender 2.49

Wood texture UV unwrapping

Final cycles render in Blender 2.63

Reversing key.


A reversing key is used in the circuit to reverse the direction of current in the circuit.
I have done the reversing key using the Cycles rendering with a simple plane for the base and 2 emission lights.

Below you can see the before and after image renders of the same.

Done in Blender internal render 2.49.


Brass material texture settings done by me.   









Rendered with the  brass material settings given by Bhavya.



This is my brass setting for Reversing Key rendered in cycles, Blender 2.63

Friday, July 20, 2012

Sonometer 3D Model.

When i joined the Blender team i had not heard about the Blender software. I have worked in 3ds Max, Maya, 2D softwares etc. I took a month to learn blender and i found it to be similar to maya . Sonometer was the first model i created in blender and also did UV unwrapping for the first time. 

During the process i had problem with the hollow circle then my colleague Nitin helped me out by showing me an other alternative way.  Took me 2 weeks to complete it and was happy with the results.


Below i have posted the images  on how i did it.

Side view with proper wood texturing. Below u will find the video link on how i did the hollow circle.




"How to use Boolean modifier".


Top view of the final model. UV Unwrapping has been done for the scale as well.


Side view wire-frame mode render. 




Simple mesh like cube, cylinder have been used to create the model.




METER BRIDGE

                                                                 METER BRIDGE

                                                    

In meter bridge, the wooden portion was unwrapped. The brass material is applied on keys. Material values of copper is ; Glossy BSDF & RGB value as R=0.801, G=0.396, B=0.272 & A=1.000
And the metallic string's values are; Glossy BSDF, RGB value R=0.800, G=0.800, B=0.800 &  roughness as 0.010

Tangent Galvanometer in Cycles

Hello Everyone,

Tangent Galvanometer is a instrument used in physics experiment for the measurement of electric current. It works by using a compass needle to compare a magnetic field generated by the unknown current to the magnetic field of the Earth.

The 3D model is made by Bhavya Balakrishnan in Blender 2.59 version and rendered in Blender Internal render engine.

Now the material and lighting is done again in Cycles.


Final Render
Details In UV Mapping
Base Details
Earlier Render In Blender Internal
The model is correct in how it should look but geometrically speaking the model has some fault which I am in process of correcting and will upload soon.

Thursday, July 19, 2012

Test tube holder

                                                                    TEST TUBE HOLDER


The wooden portion was unwrapped, since the texture was getting stretched. And the copper values was set as given below : 

3D Models for Physics Repository with Cycles in Blender

Hey,

In addition to my previous models for Physics, these are few more. Following are the existing models on the OSCAR website, whereas, just below them, is an images showing renders of the same models in Cycles:

Screw gauge: It is a device, sometimes known as a micrometer, incorporating a calibrated screw used widely for precise measurement of small distances in mechanical engineering and machining as well as most mechanical trades, along with other metrological instruments such as dial, vernier, and digital calipers.

Jockey: It locates the Null point deflection after taping and is a device that has almost zero resistance.

Vernier Caliper: The vernier, dial, and digital calipers give a direct reading of the distance measured to high accuracy. They are functionally identical, with different ways of reading the result. These calipers comprise a calibrated scale with a fixed jaw, and another jaw, with a pointer, that slides along the scale. The distance between the jaws is then read in different ways for the three types.

Here are the initial renders in Blender 2.49:

Screw Gauge, Jockey and Vernier Caliper (Blender Render)



Here are the renders in Cycles render Engine:

Jockey, Vernier Caliper and Screw Gauge (Cycles Render)


Jockey, rendered with Cycles has two materials, a black one, which has a Mix shader, with Diffuse and Glossy, as the shades and the other one is metallic, steel, which again uses the glossy material. My Colleague, Pankaja helped me with the metal texture.

Screw Gauge, rendered with Cycles has four materials, three shades of Grey, with glossy materials and varying roughness and the last one for the UV mapping purpose, to display the scale on the surface of the model. Two of my colleagues, Bhavya and Nitin, helped me out with the UV texture.

Vernier Caliper, also rendered with Cycles has two materials, a shade of Grey, with glossy material and some roughness and another one for the UV mapping purpose, to display the scale on the surface of the model.

Following are the settings for the metallic material:

 

Potetiometer and Scale texture in Cycles

Hello Everyone,

Potentiometer is an instrument used in physics experiments to determine the potential difference of an instruments.

Screw Details
Measuring Scale

Final Render in Cycles 300 Sample
Originally done Blender 2.4



























Metallic textures are easy enough to do with using mix shadder with difuse and glossy shader.
The real problem comes in Measuring Scale while doing scale markings.
Generally after getting glass right any material should sound easy enough to do, but my team mates would say differently, after glass there is UV mapping.
So UV mapping in this one I would say was quite different from the others which I had done so far.

Unwrap process in simple enough to select the upper face of the measuring scale and select unwrap option.
The problem begins after you unwrap and apply image texture. For scale marking we need a good transparent image texture in .png format and alpha mapping should do the trick right? wrong...
For this texture to make happen I tried all the possible mapping technique I knew alpha mapping, tried all the forms of unwrapping, cube projection etc.
Like Glass Jar earlier where problem was with mesh rather than material, but in this mesh was as simple as it can be a CUBE!.
I could only see scale marking as the mixture of both scale texture and wood material, depending upon the factor value in mix shader, and after using invert node i got the scale marking in white color rather than black.
Node setup and aftter invert node.
So I thought problem is in texture itself and my team mate Bhavya Balakrishanan prepared a new texture.
But with new texture the problem was in render it didn't show any texture.
Add caption

But than alpha mapping did the trick.. I connected alpha of the image texture to invert node and output of invert node to factor value of mix shader and finally it is done.
The Final Node setup.
UV mapping is not that difficult as it sounds it is but there is a method and particular steps to follow and a definite way to unwrap your mesh and not just the hit U key and Unwrap.

Burner with fire effect


video

I have add a new mesh object to create a new particle system for it to be used as a smoke flow. To emit fire, you can always use a typical "No physics" particle system. It allows fire to have some random initial velocity causing some cool turbulence and random movement.

Particle System and Domain settings:
In Particle system i have taken 10000 number of particles and particle display is point. I have use cube as a domain object and division 40. I have also use the Smoke High Resolution option for realistic effect. Also note when simulating fire that domain resolution changes fire behavior and looks. I used 2 resolution divisions for final render, but you should run some test simulations before even enabling high resolution. This way you don't have to use so much time in resimulating if some values are messed up.


Smoke in Particles:
Now create the smoke "Flow" using this particle system. As for the settings: I have used "Temp. Diff" to 1.0 to get faster rising fire. You can lift it even higher if you want it to rise even faster, lower it if you want "slow motion". This also depends on how large fire are you making.


Material settings for Domain :
Next the settings of the two Voxel Data textures used to create the fire effect from the Blender smoke simulation. The first one has the usual settings to set the density of the volume material accourding to the voxel data of the simulation. The second one has the most important part of the setup - the color ramp that multiplies on the emission color. Notice it's got completely transparent parts on both ends and no part is fully opaque. After baking particles you can see the final render output in video.

Wednesday, July 18, 2012

Glass Jar in Cycles. (Re do)

Hello,

Glass Jar which was earlier done by Sneha Deorukhkar, credits goes to her for the good material work and lighting.


Earlier Render

But while she finished with glass jar the base part of the object didn't look good.
I thought it might be the reflection of the world color I tried changing it but no change in the output.
I tried some unusual setup in nodes but those experiment didn't work either.
Finally I gave up and posted thread on blenderartist.org forum.
No reply for 2 days.
Some people suggested disable caustic option in render and it changed the output a bit but it didn't solve the problem either.
The real problem was actually with mesh of the base part.
Still working in Blender for so long I forgot about triangular mashes.
I edited the base part removed  the triangular faces as much as I could and minimize them as possibly as I can.
And this did the trick.
The next render was a clear than what I had thought for.
And after referring some of the threads in blenderartist.org about cycles and rendering setting that was it.

500 Samples
Final Render













In materials I have used mix shader with Transparent and glass shader the factor is 1.

The render settings which I did to get clear transparent glass without the black smudges at the edges is you can see in the screen shot above.

Increase the value of Max Bounce and Transparency Max.
The minimum value for glass is 150.
Increase the light paths value also.

The credit goes to Sneha Deorukhkar for earlier glass material and light setup. Glass material is one of  the hardest to get so far.
And not to mention the render time the final render took 1 hour 21 minute.



Distillation Column

MHRD Learning Objects Developed by IRCC IIT Bombay 2011

Project: OSCAR
Content: 3D animation using Blender 3D 2.56 Beta, 
Simulation


Voltmeter & One way key

        VOLTMETER :                                                               
 Voltmeter
Black plastic material values are given below: 



In above image, Diffuse BSDF is used & the scale is applied as image texture. In this red terminal, add Diffuse  BSDF & give R=0.168, G=0.01014 & B=0.000 
                         


                          


One way key:

The one way key's material is same as tap key. I have put mix shaders to get the result of Black plastic material of key. One is Glossy BSDF & other is Diffuse BSDF with roughness as 2.000 & 0.000 respectively.