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This article is a 3d rendering tutorial about Christmas scene shared by 3d artist Drown. The article is organized by Fox Renderfarm, the leading cloud render farm in the CG industry. Because there are so many items in the scene, this tutorial will focus on the lighting of the scene and the skills to create a Christmas atmosphere, and the adjustment of the material will be briefly described.!KeyShot 9 Tutorial Christmas Scene Rendering 0!KeyShot 9 Tutorial Christmas Scene Rendering 1Use KeyShot 9 to open the placed Christmas scene, add a camera and adjust the appropriate angle and save. The next work is to give the main body a crystal ball of glass material, and change it to the product mode in the lighting mode, so that light can pass through the glass ball to illuminate the internal details.!KeyShot 9 Tutorial Christmas Scene Rendering 3The tablecloth in the scene and the curtains in the background were selected from red velvet material. The official velvet material of KeyShot 9 was selected to bring out the atmosphere of the Christmas scene.!KeyShot 9 Tutorial Christmas Scene Rendering 4Next, we need to find a suitable HDR map. Because it is a Christmas scene, we need an indoor HDR map with many small bright light sources to simulate the scene atmosphere of the decorative chandelier on Christmas eve. After using the HDR map, rotate it to an appropriate angle to adjust the brightness, contrast, hue, saturation, etc. of the picture to make the scene warm and cold.!KeyShot 9 Tutorial Christmas Scene Rendering 5Enter the image panel, change the image style to photography, adjust the exposure, contrast, etc., to further enhance the warm and cold, light and dark contrast of the scene.!KeyShot 9 Tutorial Christmas Scene Rendering 6Next, open the HDR canvas and manually add a small warm light source to cover the cold-light incandescent light on the original image to further strengthen the Christmas Eve atmosphere. Pay attention to keep the cold light in the scene properly to avoid the scene being too warm. At the same time, the brightness of the small warm light source should be adjusted appropriately and the blending mode changed to ALPHA to ensure that the cold-light incandescent lamp can cover the original image.In order to highlight the crystal ball of the subject, add a sphere to the scene and set the material as a spotlight. After adjusting the position, illuminate the crystal ball.!KeyShot 9 Tutorial Christmas Scene Rendering 7Further fine-tuning various lighting parameters, the atmosphere of the picture is already in place at this time, but now the picture is a little too warm and lacks a bit of realism.!KeyShot 9 Tutorial Christmas Scene Rendering 8Add a cool rectangular light on the right side of the screen to reconcile the warm atmosphere of the screen, so that the screen effect will not be too false. Here we must pay attention to changing the blending mode of rectangular light to blending to avoid the glass ball reflecting pure white rectangular light directly and causing the realism of the picture to be lost.!KeyShot 9 Tutorial Christmas Scene Rendering 9After the atmosphere of the screen comes out, you can start adjusting the texture. Start with the snow in the crystal ball. Use the noise texture node to add bumps to the snow and snow colors on the surface. If the screen freezes, you can hide other items in the scene, including the spotlight.!KeyShot 9 Tutorial Christmas Scene Rendering 10Next, use the matching map to adjust the material of the lounger inside the crystal ball. Anything can be placed here, not necessarily the chair, as long as it is a suitable material and color. It is recommended to use a brighter color scheme to match the atmosphere of the scene.!KeyShot 9 Tutorial Christmas Scene Rendering 11Next adjust the texture of the Christmas tree.!KeyShot 9 Tutorial Christmas Scene Rendering 12After lighting the bulb material on the Christmas tree, observe the current effect. Note that the glass of the crystal ball must be given a transparent glass material, otherwise the light will not find the scene inside the crystal ball and let the light penetrate into the interior scene.!KeyShot 9 Tutorial Christmas Scene Rendering 13Use the matching wood texture map to simply adjust the wood texture base material, and adjust it according to your favorite, such as using a black plastic base.!KeyShot 9 Tutorial Christmas Scene Rendering 14Then open the texture of the glass ball, add the fingerprint texture that is official with KeyShot 9, and after adjusting the position size, turn off the texture repeat, and add the diffuse reflection texture as the fingerprint texture. After that, the fingerprint texture is connected to the label, and the texture is used as the color of the texture. Here, the brightness must be adjusted, and it should be reduced as much as possible to make the fingerprint faintly visible.!KeyShot 9 Tutorial Christmas Scene Rendering 15Use scratched maps, adjust the contrast with color, and control the transparency effect on the glass. Repeat this step to make scratches and bumps on the glass. The effect of the scratches is a little bit, otherwise the glass will look fake.!KeyShot 9 Tutorial Christmas Scene Rendering 16Next use to adjust the texture on the crystal ball name tag.Then use PS to edit a piece of text, pay attention to use a black background, pure white fonts, and use horizontal composition. After saving the black and white picture, use the 3D--Generate Normal Map option in the PS filter to generate a bump texture.!KeyShot 9 Tutorial Christmas Scene Rendering 18Drag the texture to the texture of the brand, create a new texture as the material of the lettering, and adjust the color according to your preference. After adjusting the texture, the black and white image is used as the opacity, and the normal texture is used as the bump. Pay attention to the normal To complete the adjustment of the brand-name texture.Simply adjust the material of the board, and the color matching needs to be darker to avoid the board being too conspicuous. Then use the fuzzy nodes in the geometry to make fluff on the tablecloth. The surface material of the nodes can directly use the original red velvet material.!KeyShot 9 Tutorial Christmas Scene Rendering 20!KeyShot 9 Tutorial Christmas Scene Rendering 19In order to prevent fluff from passing through the model, you can simply render a top view, and then draw a black and white texture according to the position of the item in PS. Use a Gaussian blur filter to blur out the edges of the black and white texture. Then use the texture map as the length texture of the fur node. The length of the fluff where the texture is black is 0. After the geometry node is re-executed, the fluff will not pass through the model.The curtain can use the color gradient node. Change the gradient type to the viewing direction to enhance the volume of the curtain fabric. The background wall is not easy to be too dark or too bright, otherwise the background is too eye-catching and will destroy the atmosphere of the scene.!KeyShot 9 Tutorial Christmas Scene Rendering 21The use of glass as the texture of the candle's wrapping paper can reduce the refractive index to make the texture of transparent plastic wrapping paper. Later, the translucent material is used to adjust the candles, and the color matching can be free.!KeyShot 9 Tutorial Christmas Scene Rendering 22To color various gift boxes, it is recommended to color each gift box, and cool colors are recommended to use blue to correspond to the cold light atmosphere in the scene.!KeyShot 9 Tutorial Christmas Scene Rendering 23Next, you need to adjust the surface effect of the gift box to make the bumpy texture on the gift box. The effect does not need to be too complicated, it can be simpler.!KeyShot 9 Tutorial Christmas Scene Rendering 24Next, add a sphere to the inside of the crystal ball to make a snow effect inside the crystal ball. Finally, fine-tune the composition, lighting, and then render the image.!KeyShot 9 Tutorial Christmas Scene Rendering 25ConclusionNow you know how to render a Christmas scene in KeyShot 9, don't you? Why not give it a try? 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Do you want to learn 3D modeling? There are some 3D modeling software that are very powerful, but often require you to pay for them. Blender is a free 3D software. But if you don't want to download the program and just model, then get to know these 3D modeling websites that allow you to model online.The best cloud rendering services provider and GPU & CPU render farm, Fox Renderfarm will share with you 9 best and free 3D model sites.- What is Cloud Rendering or Cloud-based Rendering?- Top 10 Free And Best Cloud Rendering Services in 2022 1. SketchUp - Free 3D Modeling Website!SketchUp - Free 3D Modelling WebsiteSketchUp is a powerful 3D modeling software for a wide range of drafting and design applications, including architecture, interior design, etc. SketchUp Free is free web-based 3D modeling software capable of making anything you can imagine without having to download anything. But SketchUp Free is more limited than paid versions like SketchUp Go, SketchUp Pro, and SketchUp Studio. However, it is still a very good and free 3D modeling website. 2. Tinkercad - Free 3D Model Site!Tinkercad - Free 3D Model SiteTinkercad is a free web application for 3D design, electronics and coding from Autodesk. It is a very popular online 3D modeling website, with a friendly interface and very easy to use. In addition, it is a popular platform for creating 3D printed models, as it can easily export STL files for 3D printing. 3. Vectary - Online 3D Modeling Site!Vectary - Online 3D Modeling SiteVectary is a free 3D modeling tool designed to help create, share and customize 3D designs. You don't have to download or code, you can do 3D modeling directly in your browser. One feature of Vectary is that you can use AR to enhance reality. If you need to request a workspace, then a paid version is available for you to choose from, but the basic version is always free. 4. Model Online With Figuro!Model Online With FiguroFiguro is a free online 3D modeling tool for 3D artists, game developers, designers and more. With Figuro you can create 3D models quickly and easily. 5. Free 3D Modeling Site - SelfCAD!Free 3D Modeling Site - SelfcadSelfCAD is a 3D modeling software that allows you to design, model, sculpt, sketch, render, and animate in 3D. He offers a free 3D modeling software program for students and hobbyists. With SelfCAD you can also do 3D printing easily. 6. Third Design - 3D Modeling Website!Third Design - 3D Modeling WebsiteThird Design is a 3D modeling and 3D animation creation software which is online and free. You can use it to quickly create 3D models and 3D animations. He provides free models to help you do 3D modeling easily. If you want others to give comments on your 3D designs, you can share an unlisted link to them so you can gain meaningful comments. Third Design's basic version is free and a more advanced paid version is available for professionals and businesses. 7. SculptGL - Free 3D Model Site!SculptGL - Free 3D Model SiteSculptGL is a free 3D modeling website and application focused on 3D sculpting. It allows you to create characters from basic shapes. The process of sculpting a character looks like sculpting clay. But with this 3D online modeling software it helps you to bring your characters to life. 8. 3DSlash - Easy 3D Model Site!3DSlash - Easy 3D Model Site3D Slash is a 3D modeling program that is very easy to learn and use, with a simple interface. 3D Slash works in a way that makes it feel like a Minecraft game. Users use a set of tools to create models by "cutting cubes". 3D Slash is web-based, but of course the desktop version is also available. The basic version is free. 9. Online 3D Modeling With Clara.io!Online 3D Modeling With Clara.ioClara.io is a full-featured and free online 3D modeling, animation and rendering software that runs in your web browser. It supports rendering in the cloud using VRay, which allows you to generate realistic renderings.Fox Renderfarm hopes you can find the best 3D modeling website to create your own 3D work! It is well known that Fox Renderfarm is an excellent cloud rendering services provider in the CG world, so if you need to find a render farm for 3D program, why not try Fox Renderfarm, which is offering a free $25 trial for new users? Thanks for reading!

The fast cloud rendering services provider and GPU & CPU render farm, Fox Renderfarm will still share with you the difference between GPU and CPU rendering. - Three Aspects to See the Differences Between GPU and CPU Rendering (1)") 2. The Magic Inside of CPU and GPUThe above picture origins from the NVIDIA CUDA document. The green color represents computing units, orange-red color represents storage units, and the orange color represents control units.The GPU employs a large number of computing units and an extremely long pipeline, with only a very simple Cache-free control logic is required. But CPU is occupied by a large amount of Cache, with complex control logic functionality and lots of optimization circuits. Compare to GPU, CPU’s computing power is only a small part of it.And that’s most of the GPU's work look like, large work load of computation, less technique but more repetitive computing required. Just like when you have a task of doing the number calculation within 100 for a hundred million times, probably the best way is to hire dozens of elementary school students and divide the task, since the task only involve repetitive work instead of highly-skills requiring. But CPU is like a prestigious professor, who is proficient in high-level of math field, his ability equals to 20 elementary students, he gets higher paid, of course. But who would you hire if you are Fox Conn’s recruiting officer? GPU is like that, accumulates simple computing units to complete a large number of computing tasks, while based on the premise that the tasks of student A and student B is not dependent on each other. Many problems involving large numbers of computing have such characteristics, such as deciphering passwords, mining, and many graphics calculations. These calculations can be decomposed into multiple identical simple tasks. Each task can be assigned to an elementary school student. But there are still some tasks that involve the issue of "cloud." For example, when you go to a blind date, it takes both of the parties’ willingness to continue for further development. There's no way to go further like getting married when at least one of you are against this. And CPU usually takes care of more complicated issue like this.Usually we can use GPU to solve the issue if it’s possible. Use the previous analogy, the speed of the GPU's computing depends on the quantity of students are employed, while the CPU's speed of operation depends on the quality the professor is employed. Professor's ability to handle complex tasks can squash students, but for less complex tasks with more workload required, one professor still can not compete with dozens of elementary students. Of course, the current GPU can also do some complicated work, which is equivalent to junior high school students’ ability. But CPU is still the brain to control GPU and assign GPU tasks with halfway done data 3. Parallel ComputingFirst of all, let's talk about the concept of parallel computing, which is a kind of calculation, and many of its calculation or execution processes are performed simultaneously. This type of calculation usually can divide into smaller tasks, which can then be solved at the same time. Parallel computing can co-process with CPU or the main engine, they have their own internal storage, and can even open 1000 threads at the same time.When using the GPU to perform computing, the CPU interacts mainly with the following:- Data exchange between CPU and GPU- Data exchange on the GPU In general, only one task can be performed on one CPU or one GPU computing core (which we usually call “core”) at the same time. With Hyper-Thread technology, one computing core may perform multiple computing tasks at the same time. (For example, for a dual-core, four-thread CPU, each computing core may perform two computing tasks at the same time without interruption.) What Hyper-thread do is usually double computing core’s logical computing functionality. We usually see that the CPU can run dozens of programs at the same time. In fact, from a microscopic point of view, these dozens of programs are still dependent and serial computing supported, such as on four-core and four-thread CPU. Only four operations can be performed at a time, and these dozens of programs can only be executed on four computing cores. However, due to the fast switching speed, what is shown on the macroscopic is the superficial fact that these programs are running “simultaneously”.The most prominent feature of GPU is: large numbers of computing cores. The CPU's computing core is usually only four or eight, and generally does not exceed two digits. The GPU computing core for scientific computing may have more than a thousand calculation cores. Due to the huge advantage of the number of computing cores, the number of computations that the GPU can perform far outweighs the CPU. At this time, for those calculations that can be performed in parallel computing, using the advantages of the GPU can greatly improve the efficiency. Here let me explain a little bit of the task's serial computation and parallel computation. In general, serial computing is doing the calculation one by one. In parallel computing, several parallel computing is to do it simultaneously. For example, to calculate the product of real number a and vector B=[1 2 3 4], the serial calculation is to first calculate a*B[1], then calculate a*B[2], then calculate a*B[3], and finally calculate a*B[4] to get the result of a*B. The parallel calculation is to calculate a*B[1], a*B[2], a*B[3], and a*B[4] at the same time and get a *B results. If there is only one computing core, then four independent computing tasks cannot be executed in parallel computing, and can only be calculated in serial computing one by one; But if there are four computing cores, four independent computing tasks can be divided and executed on each core. That is the advantage of parallel computing. Because of this, the GPU has a large number of computing cores, and the scale of parallel computing can be very large, computing problems that can be solved by parallel computing, which showing superior performance over CPU. For example, when deciphering a password, the task is decomposed into several pieces that can be executed independently. Each piece is allocated on one GPU core, and multiple decipher tasks can be performed at the same time, thereby speeding up deciphering process.But parallel computing is not a panacea, it requires a premise that the problems can be executed in parallel computing only when they are able to be decomposing into several independent tasks, which many of them are not able to be decomposed. For example, if a problem has two steps, and the second step of the calculation depends on the result of the first step, then the two parts cannot be executed in parallel computing and can only be sequentially executed in sequence. In fact, our usual calculation tasks often have complex dependencies that can not be parallel computed. This is the big disadvantage of the GPU.About GPU programming, there are mainly the following methods: Fox Renderfarm hopes it will be of some help to you. It is well known that Fox Renderfarm is an excellent cloud rendering services provider in the CG world, so if you need to find a render farm, why not try Fox Renderfarm, which is offering a free $25 trial for new users? Thanks for reading!