Realtime Renderer

[Klacee Sawatzky]

Asa wish there should be two setting, one for the viewport sampling and one for the actual rendering.

I think in Blender Cycles you can set differently as the usage is a bit different for the realtime view.

I am trying to make a semi transparent curtain fabric using OmniSurface MTL inside RTX Real Time renderer but changing the opacity down from 100% simply makes the object dissapear. Am I doing something wrong ?

Unfortunately, ProWalker GPU is discontinued as of Sketchup 2024 and while the company offers an alternative in the form of PodiumxRT for real time rendering, it is CPU based, giving me the issue that I am unable to continue my work while it is rendering.

So: I am very happy still with SU Podium and am looking for an affordable GPU based real time render alternative to work besides it. The issue I think I might have, is that SU Podium uses its own material base with material settings and I am doubting another renderer would work with that.

I am now thinking it should be adding basic colors in Sketchup to the separate groups/components (not surfaces) I want to have different materials for within D5. Changing those would mean I would have to go back into Sketchup and assign a different color if that makes sense.

Omniverse RTX Renderer provides the RTX - Real-Time ray tracing mode which allows rendering more geometry than traditional rasterization methods as well as physically-based materials at a high fidelity, in real-time.

In RTX - Real-Time mode, the renderer performs a series of separate passes that compute the different lighting contributions (for example: ray-traced ambient occlusion, direct lighting with ray-traced shadows, ray-traced indirect diffuse global illumination, ray-traced reflections, ray-traced translucency and subsurface scattering). Each pass is separately denoised, and the results are composited.

DLSS Frame Generation boosts performance by using AI to generate more frames. DLSS analyzes sequential frames and motion data to create additional high quality frames. This feature requires an Ada Lovelace architecture GPU.

Mode which favors performance with many lights (10 or more) and closer parity to RTX Interactive (Path Tracing), with some image-stability trade-offs. Enables Sampled Lighting which scales well with many lights (10 or more), but is less temporarly stable due to denoising.

Automatically determines the image-space grid used to distribute rendering to available GPUs. The image rendering is split into a large tile per GPU with a small overlap region between them. Note that by default not necessarily all GPUs are used. The approximate number of tiles is viewport resolution divided by the Minimum Megapixels Per Tile setting, since at low resolution small tiles distributed across too many devices decreases performance due to multi-GPU overheads. Disable automatic tiling to manually specify the number of tiles to be distributed across devices.

This normalized weight can be used to decrease the rendering workload on the primary device for each viewport in relation to the other secondary devices, which can be helpful for load balancing in situations where the primary device also needs to perform additional expensive operations such as denoising and post-processing.

Multi-GPU is disabled for mixed-GPU configurations. This can be overridden with a setting. Note that the GPU with the lowest memory capacity will limit the amount of memory the other GPUs can leverage.

A GPU information table is logged to the omniverse .log file under [gpu.foundation] listing which GPUs are set as Active. Each GPU has a device index assigned and this index can be used with the multi-GPU settings below.

Unreal Engine Team recently released two addons that greatly streamline the workflow between moving assets between Blender and Unreal Engine. In conjunction with this addon is our UE to Rigify feature, which allows Blender users to import any characters from Unreal Engine and have access to Rigify animation controls. This allows you to more easily animate characters within the Blender to Unreal workflow. This not only applies to bipedal characters but also quadrupeds!

Other real-time render engines, such as Eevee, use phony global illumination and volumetrics, resulting in surreal results. Unreal Engine, on the other hand, performs all of these things rather precisely by adhering to real-world physics principles.

The Unreal Engine is used to produce 3D scenes for animations in addition to being a game engine. In real time, it generates ultra-realistic render outputs. It was created by Epic Games and is accessible for free. It is based on the DirectX 11 and DirectX 12 API.

D5 Render Engine is a professional tool for real-time rendering that is used by numerous Studios and Freelancers. It is one of the greatest real-time render engines in the business. D5 Render is a renderer that works with a variety of 3D software, including Blender, and it makes use of every pixel of your GPU to produce super-precise render outputs. D5 Converter for Blender is a plugin for those who want to use Blender scenes or models within D5 Render. (Version Support: Blender 2.8.2 and above)

Eevee is the most widely used real-time render engine, and it comes pre-installed with Blender. Eevee is a lightning-quick render engine that aids artists in setting up and previewing lighting in real-time.

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There are a variety of architectures in 3D real time rendering that are applicable to a variety of use cases, each with their own benefits and trade offs in performance and capability. The following is a summary of each as well as a detailed description of their implementation.

Though each implementation can be done in any graphics API, all code in this post will be using Vulkan with no dependencies, as Vulkan offers the best perspective of computer graphics APIs and the most compatibility across operating systems. In addition, though some concepts are applicable with 2D renderers (in particular the immediate mode model used often in UI frameworks like Aymar Cornut's (@ocornut) imgui and Wenzel Jacob's NanoGUI. This post will primarily focus on writing a renderer for a 3D application.

The glTF Specification [Cozzi et al. 2016] offers a useful perspective on the organization of data in a real time rendering application. Data in a real-time application can be described as being composed of:

A collection of Primitives that those nodes point to, each of which represents 1 draw call in a graphics API. Each Primitive points to mesh buffers and a technique with its own parameters.

Most rendering architectures organize their data in this format, and indeed most model files organize themselves in this way as well. This consistent data design makes it easier for applications to interoperable and work together to help design, model, and render a given scene.

Immediate Mode Context Rendering normally uses a singleton stack containing draw calls, and when updating the frame it pops that stack until it's empty with each draw command. Afterwords the Immediate Mode Context Renderer has a list of command buffers that it executes in a given Graphics API. Due to the nature of this architecture it is difficult it can be less performant than an inturupt, subscriber based architecture where elements are explicitly added/removed from a graphics state. As such, this architecture is normally relegated to UIs or 2D applications where such performance concerns aren't an issue.

Forward Rendering is arguably the first and most common implementation of real time rendering. It is capable of practically every effect you can ask for, from transparency, refraction, reflection, MSAA, and much more.

Deffered Rendering is arguably the most intuitive. Instead of rendering lighting information on a per mesh level, you render it on a per pixel level of the current surface. This can result in easier to architect post-processing effects and faster lighting for cases of scenes with a lot of lights. At the same time, it can be somewhat slower than forward rendering since there can be more divergance in an image resulting in stalls.

Tiled Deffered takes advantage of the fact that GPUs execute shaders in "tiles" and leverages that to automate the addition of such tiles rather than using blend modes. Keeping this data away from the shader author and making it automatic has the benefit of reducing complexity while at the same time increasing performance.

In the same vain as the days where per vertex Gouraud shading was the state of the art, it's now possible to limit shading to an object in texture space, reducing the amount of expensive lighting calculations on that object.

By using Sampler Feedback along side other modern graphics techniques such as compute shaders, mesh shaders, and variable rate shading, this technique can allow for more efficient processing of expensive lighting operations and thus more work distributed across a variety of tasks in your graphics application. This was featured in DirectX 12 Ultimate's Announcement.

There have been a number of short films done using Unity, and even a cartoon series. Unreal Engine has actually been used for TV shows in the past, as has even the old Quake 3 engine! Heck, there are some shots in Rogue One that were rendered in real time on set that made it into the finished film, using Unreal Engine 4.

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