CAD PROJECT - CASE STUDY 7

PHOTOGRAPHIC SUBSTITUTION

CONCEPT :

Photographic Substitution is a technique in which a computer generated 3D model is superimposed  (kept on the top of) a realistic photograph to conduct a convincing and realistic presentation .  When we try this we get a better understating about whether the conceptual design properly  merges with the actual background in terms of proportion , colour , texture , etc. To create such a perfect presentation you have to perform the following activities .

1. Capture a photograph from the actual background using a digital camera.

2. Photo editing of the background image to remove unwanted objects using Adobe Photoshop .

3. Create the 3D Model of the object (to be superimposed on the background image) using AutoCAD .

4. Apply finishes (materials) , lights and camera (matching camera angle of the actual photograph) , using AutoCAD or 3DS Max

5. Render this model , save the image and overlay it on  the  background image using Adobe Photoshop . 

LIVE EXAMPLE :

A college has constructed a pavilion in connection with a basket ball court and they need to protect this place by providing a slopped roof with shingles . The college has provided the following photograph captured from the site .

As you can see , this background image needs some photo editing in the first place because there are some unwanted objects like pump set , support for painting etc. to be removed from the photograph .Then some additional details like flowers , pavement tiles etc are to be added on the image .This work is done in Photoshop . Click to enlarge this following image to see the image after photo editing .

After this photo editing work the 3D model of the protection for the pavilion is created using AutoCAD . A sloped roof is made and it is supported using frame work to protect the area below . Here is the image of the 3D Model . 

This file is taken to 3DStudio max  and a camera is placed which matches with the camera view of the background image . Perspective matching is done through trail and error method . (Preferably both these cameras should have the same parameters such as focal length , distance from the target etc. ) The rendered model without the background appears as shown below.

The following shingle tile was used to create the material

This image is taken to Adobe photoshop ,  pasted against the background image and the black transparent areas are deleted to get the realistic feel of the pavilion area protected by the framed roof . 

Such a presentation would be always be more effective and successful because seeing is believing.

Click on the following video to see the three stages :

AUTOCAD 3D HOUSE TUTORIALS

AUTOCAD SINGLE STORIED 3D HOUSE VIDEO TUTORIALS

In this post I would like to share with you series of video tutorials explaining in detail the procedure to create a single storied house using AutoCAD 3D . Please go through each video and try the procedure on your own using the drawing files provided on the video description page of each video .

You can interact with me for any clarifications .

Introduction 

In this video You will get an idea about the the role of AutoCAD , 3DStudio max and Photoshop soft wares in creating a photo realistic view .   

Creating 3D Walls

The following videos demonstrates two different procedures to create 3D walls using AutoCAD .

You can go through each procedure and understand the difference .

Creating 3D Door

This video teaches you the the steps to create various elements of a 3D door such as door frame , door shutter etc, . Just create a door and you can use it for any number of times in all your future projects .

Create 3D Window

This video teaches you the procedure to create 3D windows . The various elements of a window such as window frame , shutter , glass etc. are shown using an animation and you will also get an idea about the design and dimensions of these elements . 

Create 3D Ventilators 

Creating Foundation , Steps , Floor  and Car porch

Creating 3D Sloped Roof with Gable 

These videos demonstrates the method to create a 3D sloped roof using AutoCAD with ease .

Create Plastering grooves on the wall

Create a Compound wall

Create a Path way make a perspective view

Once you complete all the lessons you will be in a position to perform Architectural modelling using AutoCAD . You can also reuse all the objects such as door , windows , ventilator etc in your future projects . You can go through each lessons while you practice so that you can go along with the tutorials with the same pace  . The more you practice the greater will be your confidence level and speed . . The speed and proficiency cannot be obtained over night . It needs several hours of practice .



Here is another project for you to practice ...

You can download the necessary files from the video description page of  this video in Youtube . (Watch this video in Youtube).

All the best .....