ompf2.com

Pretty cool! Thanks! :) And that is just one year of development? Yes, maybe little bit more, but I'm working in full time job and unfortunately it's very hard to find enough free time for Graphics. So, I decided to do it more serious, because when I do computer graphics I feel really good :) Do yo...

YxmqBywMtR4 Here I show progressive rendering in my path tracer. Performance shown here is really bad :D I know. This is old version actually, after that I added packet tracing for primary rays it helps a lot in this type of scene. I improved traversal code significantly and speed is much better no...

This is precisely what I'll use to demonstrate MIS the next semester. Great stuff indeed, thanks!

Yeah, I showed this to my students and I think It is more clear to understand concept and basic idea of method, when you have small, lightweight, easy, real-time demo with full source code.

thanks guys!
Yeah, shadertoy is really good place to do some small experiments and share with community.
I will find more time to make code more small, readable and easy to understand.

as I guess you need something like this: color envMap::GetColor( vec3 dir ); So, there is really simple math. assumption is that those images is taken from infinite distance and viewing rays are parallel, for example (0.0, 0.0, 1.0) color envMap::GetColor( vec3 R ) { const vec3 E( 0.0, 0.0, -1.0 ); ...

https://lh5.googleusercontent.com/-MUxHJB4qTHQ/VHbsSSkdVYI/AAAAAAAAGjo/B14pxwFrmA0/w640-h360-no/MIS.png For all time I couldn't fully understand how MIS actually works and finally I found enough time to think about MIS more deeply to make things totally clear. So, from my opinion, things always is ...

according to SolidAngle documentation, Arnold has shadow_terminator_fix option, but this solution doesn't work in some cases. It works great for convex meshes, but may produce artifacts in concave areas of high curvature. A proper solution in this situation to reduce the shadow terminator artifact i...

Energy Conservation is another problem here. When I evaluate BRDF, if it always gives me a ray from hemisphere(directed to perturbed normal) minus solid angle(which fall under surface), then a corresponding pdf isn't normalized anymore and correct normalization isn't easy task for complicated BRDFs....

https://lh6.googleusercontent.com/-qhk1pZRayRM/VCJ7HMeUm6I/AAAAAAAAGdQ/kIgCOuWDbmk/w464-h248-no/perturbed_normal_problem.png this is a figure illustrating this problem. If surface is highly specular then probability that reflected ray will fall under the surface is high. Actually, this is a reason ...

Unless I'm misreading it, the paper cites filtering times ranging from 5 to 115 seconds, which seems rather large for real-time applications. yeah, maybe I exaggerated things little bit, but the Idea is really simple to classify pixels using histogram. I think this Idea can be extended to use diffe...