• ComfyUI-CoCoTools_IO – A set of nodes focused on advanced image I/O operations, particularly for EXR file handling

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    https://github.com/Conor-Collins/ComfyUI-CoCoTools_IO

    Features

    • Advanced EXR image input with multilayer support
    • EXR layer extraction and manipulation
    • High-quality image saving with format-specific options
    • Standard image format loading with bit depth awareness

    Current Nodes

    Image I/O

    • Image Loader: Load standard image formats (PNG, JPG, WebP, etc.) with proper bit depth handling
    • Load EXR: Comprehensive EXR file loading with support for multiple layers, channels, and cryptomatte data
    • Load EXR Layer by Name: Extract specific layers from EXR files (similar to Nuke’s Shuffle node)
    • Cryptomatte Layer: Specialized handling for cryptomatte layers in EXR files
    • Image Saver: Save images in various formats with format-specific options (bit depth, compression, etc.)

    Image Processing

    • Colorspace: Convert between sRGB and Linear colorspaces
    • Z Normalize: Normalize depth maps and other single-channel data
  • Ethan Roffler interviews CG Supervisor Daniele Tosti

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    Ethan Roffler
    I recently had the honor of interviewing this VFX genius and gained great insight into what it takes to work in the entertainment industry. Keep in mind, these questions are coming from an artist’s perspective but can be applied to any creative individual looking for some wisdom from a professional. So grab a drink, sit back, and enjoy this fun and insightful conversation.



    Ethan

    To start, I just wanted to say thank you so much for taking the time for this interview!

    Daniele
    My pleasure.
    When I started my career I struggled to find help. Even people in the industry at the time were not that helpful. Because of that, I decided very early on that I was going to do exactly the opposite. I spend most of my weekends talking or helping students. ;)

    Ethan
    That’s awesome! I have also come across the same struggle! Just a heads up, this will probably be the most informal interview you’ll ever have haha! Okay, so let’s start with a small introduction!

    (more…)
  • Sun cone angle (angular diameter) as perceived by earth viewers

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    Also see:

    https://www.pixelsham.com/2020/08/01/solid-angle-measures/

     

    The cone angle of the sun refers to the angular diameter of the sun as observed from Earth, which is related to the apparent size of the sun in the sky.

     

    The angular diameter of the sun, or the cone angle of the sunlight as perceived from Earth, is approximately 0.53 degrees on average. This value can vary slightly due to the elliptical nature of Earth’s orbit around the sun, but it generally stays within a narrow range.

     

    Here’s a more precise breakdown:

      • Average Angular Diameter: About 0.53 degrees (31 arcminutes)
      • Minimum Angular Diameter: Approximately 0.52 degrees (when Earth is at aphelion, the farthest point from the sun)
      • Maximum Angular Diameter: Approximately 0.54 degrees (when Earth is at perihelion, the closest point to the sun)

     

    This angular diameter remains relatively constant throughout the day because the sun’s distance from Earth does not change significantly over a single day.

    To summarize, the cone angle of the sun’s light, or its angular diameter, is typically around 0.53 degrees, regardless of the time of day.

     

    https://en.wikipedia.org/wiki/Angular_diameter