Community Digest

Top new questions this week:

Why do some videos look smoother and others don't on the same monitor

I have a Dell monitor with 60 Hz refresh rate and therefore games playing on it are not very smooth as compared to 120 hz. But when I open videos on YouTube of the same game on the same monitor, some ...

rendering 3d gpu pixel-graphics pixels  
asked by Aryan Sethi 2 votes
answered by Olivier 2 votes

Greatest hits from previous weeks:

A recent approach for subsurface scattering

I read "A Practical Model for Subsurface Light Transport" and "A Rapid Hierarchical Rendering Technique for Translucent Materials". If I understand correctly, the former does not consider the case ...

raytracing pathtracing global-illumination subsurface-scattering cuda  
asked by Mustafa Işık 8 votes
answered by RichieSams 9 votes

Mirror Reflections: Ray Tracing or Rasterisation?

Are mirror-like reflections in computer graphics purely handled with ray-tracing/ray-casting techniques or are there some situations where they are achieved through rasterisation?

raytracing rasterizer reflection  
asked by Will D 4 votes

How to map square texture to triangle?

I want to find the texture coordinates for point P. I have the vertices of the triangle and their corresponding uv coordinates. The numbers in the little squares in the texture represent color ...

asked by john john 13 votes
answered by Rotem 14 votes

What is the difference between a point transformation and a vector transformation?

This is what my lecturer told me in the coursework: We only consider 4*4 matrices. These are used to rotate, scale or translate objects (or any combination of these operations). Matrices are also ...

asked by S.A 11 votes
answered by Alan Wolfe 9 votes

How can virtual texturing actually be efficient?

For reference, what I'm referring to is the "generic name" for the technique first(I believe) introduced with idTech 5's MegaTexture technology. See the video here for a quick glance on how it works. ...

rendering texture optimisation  
asked by Llamageddon 29 votes
answered by glampert 24 votes

How are volumetric effects handled in raytracing?

How are volumetric effects such as smoke, fog, or clouds rendered by a raytracer? Unlike solid objects, these don't have a well-defined surface to compute an intersection with.

raytracing volumetric  
asked by Mark 10 votes
answered by Benedikt Bitterli 11 votes

What is the cost of changing state?

Programmers are supposed to have a fairly good idea of the cost of certain operations: for example the cost of an instruction on CPU, the cost of a L1, L2, or L3 cache miss, the cost of a LHS. When ...

performance gpu optimisation  
asked by Julien Guertault 28 votes
answered by Nathan Reed 30 votes

Can you answer this question?

What can be reduce in peripheral circle and increase in foveated cirle?

Foveated rendering, is definitely one of the newest fields of real-time graphics rendering. The main goal of foveated rendering is reducing rendering cost to increase frame-rate without perception ...

rendering real-time volume-rendering  
asked by Bipul Mohanto 1 vote
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