Incrementally baked global illumination

Luksch, Christan; Wimmer, Michael; Schwärzler, Michael

doi:10.1145/3306131.3317015

Cited by 9 publications

(5 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ward et al [32] proposed to cache the results of the ray-tracing technique into a texture. However, with the advances of GPUs, it has been proven that the texture can also be incrementally generated in real-time [33]. Greger et al [34] proposed to cache the irradiance at discrete points in world space and use this data to compute the indirect illumination.…”

Section: Real-time Global Illumination Techniques a Rendering Equationmentioning

confidence: 99%

Comparative Analysis of Real-Time Global Illumination Techniques in Current Game Engines

Lambru¹,

Morar

Moldoveanu

et al. 2021

IEEE Access

View full text Add to dashboard Cite

The most important component of photorealism in Computer Graphics is given by a physically correct approximation of the light transport. Besides the direct illumination from light sources, there is an indirect illumination, produced by the reflections of the light rays on other surfaces of the scene. In Computer Graphics, the process of computing the illumination of a surface by considering both the direct and the indirect illumination is widely known as global illumination. This paper describes several classes of real-time global illumination techniques used in current game engines together with our own implementations of these approaches. All implementations were made in our own framework, specially designed with a multi-pass rendering architecture that allows fast implementation of rendering techniques and the reuse of functionalities. We analyze these classes based on the following criteria: the visual results produced by the indirect diffuse lighting, the ability to produce glossy reflections, shadows, ambient occlusion, subsurface scattering, translucency and volumetric lighting as well as the ability to simulate area lights. We present the quantitative results of our implementations, obtained with the same external parameters for all techniques, thanks to the unified implementations in the same framework. An important observation is that our analysis is focused on the techniques that are based on the rasterization pipeline, thus, the comparison does not include the techniques designed entirely for the ray-tracing pipeline.

show abstract

Section: Real-time Global Illumination Techniques a Rendering Equationmentioning

confidence: 99%

Comparative Analysis of Real-Time Global Illumination Techniques in Current Game Engines

Lambru¹,

Morar

Moldoveanu

et al. 2021

IEEE Access

View full text Add to dashboard Cite

show abstract

“…Light maps are used widely in games, and recent research efforts have explored efficient light map approximations [Luksch et al 2013[Luksch et al , 2019. Our work is largely orthogonal, and we use diffuse light maps computed offline with a modified path tracer.…”

Section: Related Workmentioning

confidence: 99%

Glossy probe reprojection for interactive global illumination

et al. 2020

View full text Add to dashboard Cite

search. Naive probe reprojection often sharpens glossy reflections at occlusion boundaries, due to changes in parallax. To avoid this, we split the convolution induced by the BRDF into two steps: we precompute probes using a lower material roughness and apply an adaptive bilateral filter at runtime to reproduce the original surface roughness. Combining these elements, our algorithm interactively renders complex scenes while fitting in the memory, bandwidth, and computation constraints of current hardware. CCS Concepts: • Computing methodologies Ray tracing; Rasterization.

show abstract

“…In contrast to approaches like Binder et al's, our method projects the information available in path space to the according pixels in screen space, but puts the information from subsequent vertices to different layers, which are then filtered individually. Real-time glossy and specular reflections are improved by combining ray tracing with radiance probes and screen-space reflections in Hirvonen et al's work [43], while Luksch et al [44] propose a system for incrementally updating baked global illumination solutions in order to avoid visual disturbances such as flickering or noise. Their many-light GI algorithm is combined with appropriate data structures and prioritization strategies in order to compute differential updates for illumination states.…”

Section: Related Workmentioning

confidence: 99%

Hash-Based Hierarchical Caching and Layered Filtering for Interactive Previews in Global Illumination Rendering

et al. 2020

View full text Add to dashboard Cite

Modern Monte-Carlo-based rendering systems still suffer from the computational complexity involved in the generation of noise-free images, making it challenging to synthesize interactive previews. We present a framework suited for rendering such previews of static scenes using a caching technique that builds upon a linkless octree. Our approach allows for memory-efficient storage and constant-time lookup to cache diffuse illumination at multiple hitpoints along the traced paths. Non-diffuse surfaces are dealt with in a hybrid way in order to reconstruct view-dependent illumination while maintaining interactive frame rates. By evaluating the visual fidelity against ground truth sequences and by benchmarking, we show that our approach compares well to low-noise path-traced results, but with a greatly reduced computational complexity, allowing for interactive frame rates. This way, our caching technique provides a useful tool for global illumination previews and multi-view rendering.

show abstract

Incrementally baked global illumination

Cited by 9 publications

References 28 publications

Comparative Analysis of Real-Time Global Illumination Techniques in Current Game Engines

Comparative Analysis of Real-Time Global Illumination Techniques in Current Game Engines

Glossy probe reprojection for interactive global illumination

Hash-Based Hierarchical Caching and Layered Filtering for Interactive Previews in Global Illumination Rendering

Contact Info

Product

Resources

About