thefranke

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Please refer to this blogpost to get an overview.

Replace *-INSTANCE with one of the public instances listed in the scrapers section. Replace CAPITALIZED words with their corresponding identifiers on the website.

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pixnblox

Original Tweet - June 6, 2020

I really should have known this "shadow terminator" ray tracing issue was going to happen, but I stumbled into it anyway. It is a surprisingly tricky / annoying / common problem, but I got it fixed with some help from @pointinpolygon and others.

This arises from a difference between shading normals and geometric normals, particularly with low-poly geometry. This POV-Ray page has a nice diagram that explains it: http://wiki.povray.org/content/Knowledgebase:The_Shadow_Line_Artifact. This is not a floating-point precision issue.

This is also different from the "bump" terminator problem, which is about normal maps and not low-poly self-shadowing. See "Ray Tracing Gems" chapter 12 for details on that. The solution there is to modify the BSDF to add shadowin

bgolus

Shader "WorldNormalFromDepthTexture"
{
    Properties {
        [KeywordEnum(3 Tap, 4 Tap, Improved, Accurate)] _ReconstructionMethod ("Normal Reconstruction Method", Float) = 0
    }

    SubShader
    {
        Tags { "RenderType"="Transparent" "Queue"="Transparent" }
        LOD 100

pervognsen

#pragma section(".remotery_code", read, execute)

__declspec(allocate(".remotery_code"))
static const uint8_t code[] =
{
    0x50,                                           // push rax
    0x9C,                                           // pushfq
    0x53,                                           // push rbx
    0x51,                                           // push rcx
    0x52,                                           // push rdx

dpiponi

(** User Mathematica initialization file **)

(** See https://reference.wolfram.com/language/tutorial/ConfigurationFiles.html for info on instaling this file **)

(** Display graphics inline in iTerm2. I don't know an easy way to test if we're running in iTerm2 without looking at the process table. **)

imgcat[image_Graphics]:=(
  WriteString[$Output, "\033]1337;File=inline=1:"<>ExportString[ExportString[image,"PNG"],"Base64"]<>"\007"];
  Null
)

h3r2tic

A quick breakdown of lighting in the restir-meets-surfel branch of my renderer, where I revive some olde surfel experiments, and generously sprinkle ReSTIR on top.

General remarks

Please note that this is all based on work-in-progress experimental software, and represents a single snapshot in development history. Things will certainly change 😛

Due to how I'm capturing this, there's frame-to-frame variability, e.g. different rays being shot, TAA shimmering slightly. Some of the images come from a dedicated visualization pass, and are anti-aliased, and some show internal buffers which are not anti-aliased.

Final images

h3r2tic

// Copyright (c) 2023 Tomasz Stachowiak
//
// This contribution is dual licensed under EITHER OF
// 
//     Apache License, Version 2.0, (http://www.apache.org/licenses/LICENSE-2.0)
//     MIT license (http://opensource.org/licenses/MIT)
// 
// at your option.

#include "/inc/frame_constants.hlsl"