Realism in computer animation can mean making each frame look photo realistic, in the sense that the scene is rendered to resemble a photograph or make the characters' animation believable and lifelike. Computer animation can also be realistic with or without the photo realistic rendering

Photo realistic animation comes under 3d animation & cgi mostly used in games
In this you draw a character & use computer to give it depth..
The details depends on you & the depth & shadow effects depend on software you're using. B
efore I learned it was fully computer generated, I actually had no idea, and thought it was simply beautiful filming. The video is actually going viral, with over 200,000 views in the past two days. If you don’t believe it was CG, check out the following  video which is similar to a “behind-the-scenes” look into how some of the scenes were created:


At the most basic level, Computer-Generated Imagery (CGI) is the creation of still or animated visual content with computer software. CGI most commonly refers to the 3D computer graphics used to create characters, scenes and special effects in films, television and games. The technology is also used in everything from advertising, architecture, engineering, virtual reality and even art.

CGI is used extensively these days because it is often cheaper than physical methods which rely on creating elaborate miniatures, hiring extras for crowd scenes, and most commonly for when it's simply not safe or humanly possible to create the visuals.CGI is created using a range of different methods. The use of algorithms can produce complex fractal patterns. 2D pixel-based image editors can create vector shapes. 3D graphics software can create everything for simple primitive shapes to complex forms made from flat triangles and quadrangles. 3D software can even simulate the way light reacts to a surface and generate particle effects.

1. DEFINING THE STYLE OF THE CGI
The first thing we need to do is consider the overall concept, the design. We scout around, looking for visual information that captures our imagination (“us” meaning our designers and CGI artists). We make sketches, create a great mood-board that brings together all the different elements that we would like to see materialize before our eyes in the scene. With the client, we decide on a central theme and a particular style (traditional, contemporary, luxurious, vintage, modern, etc.).At this stage, we need be given as much visual information as possible so that we can visualize the finished photorealistic CGI we’re aiming for and ensure it meets the client’s aesthetic expectations


2. DESIGNING THE 3D SCENE
Once we’ve laid the groundwork for the overall concept, we can focus on designing our 3D scene. In other words, we’re going to create the entire room from A to Z, including walls, windows, and doors.

Just picture it as a photo studio…but a virtual one.
4. AND THEN THERE WAS LIGHT
If you were to ask us for the key ingredient for turning a CG image into a masterpiece of realism, we’d have to say: Light.See for yourself. The same scene, first with sloppy lighting, then properly illuminated.5. REALISM AND TEXTURE, A PRIME CONCERN
And the magic ingredient for creating a truly polished photorealistic CGI? Have you guessed?
Yes, it’s the materials.
You can have a perfected illuminated scene but if it brings to light textures which, themselves, aren’t realistic, you’ve suddenly lost that chance to make a good impression.
Textures are a top priority when creating a photorealistic CGI.

Look at the difference here.

What makes your product special is its composition: leather, chrome, hardwood, etc.

Never underestimate the importance of the quality of your product’s rendering! Reflections, effects… absolutely nothing is left to chance!

DO YOU HAVE A PRODUCT SAMPLE BUT IT DOESN’T HAVE TEXTURE?
Just send us a physical sample and we’ll take photos in our studio so that we can create its texture and then integrate it into the 3D interior design.

This technique allows us to make sure your product is perfectly depicted: the knots and grain of the wood, the textures, colors, etc.Our longstanding expertise in the field of photography has enabled us, over the years, to turn it into one of our studio’s specialties. Fear not, you won’t be getting the kind of generic rendering you see on the web. Our winning recipe, tried and tested by our clients, is a guarantee of ultra-realistic end results, even on screen! These textured images can also be used for your catalogs and marketing tools.
6. DAYTIME, NIGHTTIME OR SOMEWHERE IN BETWEEN?
It’s now time to decide what kind of mood we want our scene to convey. Adjusting the lighting at this stage is crucial because the light will play a pivotal role once the scene has been filled with objects, and it will give it that little extra something that explains why one scene speaks out to you more than an another.IT ALL COMES DOWN TO THE CHOICE OF ANGLE
That’s why we have to choose the viewpoint that best highlights the product according to both the type of product and the client’s requirements.A bit like with the lens of a camera, we need to find the angle that will showcase the visual and technical aspects of all the elements in our 3D scene.The good news is that we can experiment with all the different viewpoints because once we’ve created the scene we can move around freely within it and look at it from all sides. That’s also part of the magic of 3D rendering!
Only a few last details to work out! All we need to do now is go over the 3D image with a fine-tooth comb and smooth out any rough edges in terms of the materials, lighting, and positioning of the 3D products.
Is an element floating in space? Is there an object that lacks texture? Our eagle eyes scrutinize the entire scene to make sure nothing has been overlooked.It’s still not too late for a change of heart!  With 3D rendering, you don’t have to start all over again if you need to reposition or change an object in a scene. Being able to travel freely around the scene you’ve created allows you to make any last-minute adjustments without having to redo the entire scene from scratch!
Together with the client, and once we’re happy with the rendering created in our 3D software, we fine-tune our image according to your specific needs. In other words, we put the finishing touches to the winning version by calibrating the colors, adjusting contrasts, tweaking the colors of your product so it accurately depicts the real-life one, etc. It’s a bit like one last little preen and primp before delivering the final rendering.

10. THE FINAL 3D BEAUTY SHOT
Tadaaam !!!
And presto, the project is finished and the final image generated is of the highest possible quality (not to mention the hours of computing carried out by our super machines to achieve the highest resolution, but we’ll have a chance to talk more about that soon):
Render Final 3d exemple
Pretty good, right?.You’ll find loads of other examples in our portfolio
It’s important to understand that the entire 3D rendering process hinges on the talent of the 3D designers behind the project. 3D modeling requires skill and finesse, and that’s what makes all the difference if you want to achieve the perfect end result!
How about you? Ever thought of switching to 3D?
Our design team would be happy to take up the challenge

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