DXR_HobbyPathTracer

Hybrid Path Tracer By Use Of DirectX Raytracing [Path Tracing (DI:ReSTIR GI:Streaming RIS) + Photon Mapping(Caustics)]

Sponza.mp4

Bistro.mp4

"Next Event Estimation" and Streaming RIS is implemented for many lights.

This sampling technique can easily generate beautiful rendering images of scenes with many light sources.
(Doing) ReSTIR DI is implemented for improving the quality RIS.

Algorithm

Photon Mapping : Hashed Grid
Denoiser : SVGF (Currently Disabled)
Shading : GGX
Sampling : Next Event Estimation / ReSTIR(DI) / Streaming RIS

Debug View

Enable to check (Diffuse)Albedo / Depth / Normal

How To Use

NOTE : This program can only handle triangular polygons

With Simple Scene (Easy)

Set "SceneType_Simple" to the variable "mSceneType" at void DxrPhotonMapper::Setup()[DxrPhotonMapper.cpp]
Build and Execute

With Sponza

Download model(sponza) from "McGuire Computer Graphics Archive"(https://casual-effects.com/data/)
Open sponza.obj on blender. Set the size to 0.1 -> Execute Triangulation.
Export 3D model as obj file(Name the file "sponza.obj")
Create a new folder "sponza" in "DXRPhotonMapper/PhotonMapper/model" and copy the "textures" and "sponza.mtl" file from the downloaded folder and the obj file you just exported to the folder you just created.
Set "SceneType_Sponza" to the variable "mSceneType" at void DxrPhotonMapper::Setup()[DxrPhotonMapper.cpp]
Build and Execute

With Bistro

Download model(bistro) from "McGuire Computer Graphics Archive"(https://casual-effects.com/data/)
Open exterior.obj / interior.obj on blender. Set the size to 0.1 -> Execute Triangulation.
Export 3D model as obj file(Name the file "exterior.obj"/"interior.obj")
Create a new folder "bistro" in "DXRPhotonMapper/PhotonMapper/model". Then copy the "BuildingTextures" and "Exterior" and "OtherTextures" and "PropTextures" from the downloaded folder to the created folder. Then place the created exterior.obj / interior.obj file in the "Exterior" / "Interior".
Set "SceneType_BistroExterior" / "SceneType_BistroInterior" to the variable "mSceneType" at void DxrPhotonMapper::Setup()[DxrPhotonMapper.cpp]
Build and Execute

Graphics API

DirectX12

Action

I : determine other button meaning (+ / -)
J : start / stop model
E : enable / disable NEE
G : increase / decrease photon gather radius
X / Y / Z : light position
L : increase / decrease light emission range
T / P : light emission angle (theta / phi)
O / W : directional light angle (theta / phi)
K : increase / decrease light intensity
B : increase / decrease photon gathering block num
N : visualize caustics
D : increase / decrease number of bounce
Q : increase / decrease caustics boost
U : enable / disable texture
R : increase / decrease roughness
S : increase / decrease translucency
M : increase / decrease metallic
A : enable / disable direct lighting
C : change photon emitter type (spot light/rectangular light)
V : enable / disable debug view
F : enable / disable lighting by use of many sphere lights
MOUSE_RIGHT : rotate the camera around the camera position
↑↓→← : move the camera forward, backward, left, or right
SPACE : change the target to edit the material
CTRL : enable / disable Streaming RIS
TAB : enable / disable Temporal Accumulation
F1 : enable / disable Temporal Reuse of Reservoir
F3 : enable / disable Spatial Reuse of Reservoir
F4 : increase / decrease the number of taps for Spatial Reuse of Reservoir
F5 : enable / disable Metal Test

monguri/DXR_HobbyPathTracer