The Problem: Frequent Viewport Refreshing Slows Down Scripts A common bottleneck that slows down Blender Python scripts is the frequent refreshing of the 3D viewport required to show changes to the scene. Each time an object is added, moved, rotated or otherwise modified, Blender must re-draw the viewport to match the updated state of the…
The Problem of Implicit Updates Blender handles scene data and object dependencies in a way that can cause slowdowns in scripts. All data in a Blender scene is interconnected through a complex web of relationships. When one part of the scene data changes, dependent data needs to be updated. Blender handles these updates automatically behind…
The Problem with Default Transparency in Blender When working with transparency in Blender, users often encounter issues like noise, artifacts, and render times. The default transparency settings in Blender are not optimized for production usage. Problems arise due to aspects like: Sampler settings not configured properly for transparent materials Not enough sample counts during rendering…
Using Blender’s Python API Efficiently The Blender Python API provided by the bpy module allows convenient access to Blender’s data and utilities from Python. However, care must be taken to use the API efficiently to avoid slowdowns in operator performance. Leveraging bpy Module for Faster Access The bpy module contains data structures and utilities designed…
Setting Up Your Scene Properly Setting up your Blender scene appropriately from the start is crucial for reducing noise in renders. Careful configuration of light paths, use of portals and planes, and optimization of textures and materials can dramatically cut down on noisy fireflies and splotches. Managing Light Paths and Bounces The key setting controlling…
What is Denoising and Why it’s Useful Denoising refers to algorithms and techniques used to remove random noise from rendered images while preserving important scene details. Noise is inherent in photorealistic rendering with techniques like path tracing due to the stochastic nature of light transport simulations. Denoising removes this noise to produce clean final renders….
Reducing Noise in Rendered Images Achieving clean, noise-free renders is a constant challenge for 3D artists working in Blender. Noisy artifacts like fireflies, splotches, grain, and banding can easily creep into our beautiful scenes, especially in difficult lighting situations with lots of shadows, caustics, reflections, and refractions. However, with the right techniques we can substantially…
Reducing unwanted noise in CGI renders is an essential part of creating high-quality 3D graphics and animations. The latest versions of Blender include powerful built-in denoising capabilities that can automatically filter out noise from renders. However, even Blender’s own OpenImageDenoise denoiser is not perfect. By combining it with complementary third-party denoising plugins and optimizing scenes…
The release of Blender 2.92 came with an important fix for issues related to interpreting emissive material colors in the viewport. Prior versions contained a bug that caused emissive colors to appear muted and incorrect compared to the final rendered output. This affected both the Cycles and Eevee render engines and made precise scene lighting…
What Causes Emissive Materials to Appear Black in Viewport Emissive materials in Blender rely on scene exposure and color management settings to properly display emitting light in the viewport. However, limitations in the viewport’s ability to display a wide range of values can cause emissive materials to appear black rather than emitting light. Specifically, the…