pezcode

GPU Optimization for GameDev

Graphics Pipeline / GPU Architecture Overview

2011 - A trip through the Graphics Pipeline 2011
2013 - Performance Optimization Guidelines and the GPU Architecture behind them
2015 - Life of a triangle - NVIDIA's logical pipeline
2015 - Render Hell 2.0
2016 - How bad are small triangles on GPU and why?
2017 - GPU Performance for Game Artists
2019 - Understanding the anatomy of GPUs using Pokémon

Volumetric Clouds Resources List

A. Schneider, "Real-Time Volumetric Cloudscapes," in GPU Pro 7: Advanced Rendering Techniques, 2016, pp. 97-127. (Follow up presentations here, and here.)
S. Hillaire, "Physically Based Sky, Atmosphere and Cloud Rendering in Frostbite" in Physically Based Shading in Theory and Practice course, SIGGRAPH 2016. [video] [course notes] [scatter integral shadertoy]
[R. Högfeldt, "Convincing Cloud Rendering – An Implementation of Real-Time Dynamic Volumetric Clouds in Frostbite"](https://odr.chalmers.se/hand

CUSTOM GAME ENGINES: A Small Study

WARNING: Article moved to separate repo to allow users contributions: https://github.com/raysan5/custom_game_engines

A couple of weeks ago I played (and finished) A Plague Tale, a game by Asobo Studio. I was really captivated by the game, not only by the beautiful graphics but also by the story and the locations in the game. I decided to investigate a bit about the game tech and I was surprised to see it was developed with a custom engine by a relatively small studio. I know there are some companies using custom engines but it's very difficult to find a detailed market study with that kind of information curated and updated. So this article.

Nowadays lots of companies choose engines like [Unreal](https:

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.

	#include "../platform/platform.h"

	#include <cstdlib>
	#include <cstring>
	#include <bgfx/bgfx.h>
	#include <bgfx/embedded_shader.h>
	#include <bx/allocator.h>
	#include <bx/math.h>

	#define NK_IMPLEMENTATION

	// Copyright 2019 Google LLC.
	// SPDX-License-Identifier: Apache-2.0

	// Polynomial approximation in GLSL for the Turbo colormap
	// Original LUT: https://gist.github.com/mikhailov-work/ee72ba4191942acecc03fe6da94fc73f

	// Authors:
	// Colormap Design: Anton Mikhailov ([email protected])
	// GLSL Approximation: Ruofei Du ([email protected])

	#include <cstdio>
	#include <cmath>

	struct float2
	{
	float x = 0.0f;
	float y = 0.0f;
	float2() {}
	float2( float _x, float _y ) { x = _x; y = _y; }
	};

	uint16_t encode16_morton2(uint8_t x_, uint8_t y_)
	{
	uint32_t res=x_\|(uint32_t(y_)<<16);
	res=(res\|(res<<4))&0x0f0f0f0f;
	res=(res\|(res<<2))&0x33333333;
	res=(res\|(res<<1))&0x55555555;
	return uint16_t(res\|(res>>15));
	}
	//----