If you fall into a portal from a high ledge your momentum carries you out the second portal at the same acceleration. If you place one portal on the floor and the other on a wall this will convert your vertical movement into horizontal movement and allow you to jump large gaps.

One side effect of being able to place portals almost anywhere is the creation of infinite loops. If you place two portals opposite each other in a hallway you will see an infinite regression of yourself as you look through one portal into the other. If you place a portal on the floor directly under a portal on the ceiling you have set up a similar kind of situation. When you step into the portal on the floor you fall out of the portal on the ceiling and back into the portal on the floor. This will continue until your computer dies or until you push your joystick to one side and cause yourself you miss hitting the portal as you fall.

Valve Corporation has announced that Portal 2 will be released in 2011. The new game features the ability to direct tractor beams, laser beams and liquids through portals. Watch the videos at ThinkWithPortals.com.

¹Wikipedia

Typically when you play a puzzle game, you are given an objective and perhaps a few different ways that you can accomplish this task. However, you’re not frequently asked to readjust the reality of the world simply by manipulating the camera to close gaps between platforms. The same could be said about erasing pitfalls by changing a camera angle so a column appears to cover a hole. These optical illusions form the basis behind Sony’s latest PSN title, echochrome, which asks players to constantly tweak, bend and change their perceptions to solve deceptive puzzles. While the choice to use optical illusions is a unique one, the decision to focus upon a simple wireframe presentation adds a surprising amount of depth to this spatial puzzle title. – IGN.com

For PlayStation 3 ($10 US) and PSP

Come to think of it .. maybe the United States government ought to cancel all assistance to LA until these people develop an ability to think rationally. -Neal Boortz regarding California’s stand on Arizona’s immigration laws.

I know Neal Boortz is being facetious and being facetious is entertaining, but he seems to be trying to be rational and reasonable in the rest of his post. It just gets under my skin when talk show hosts make ad hominem attacks even if they are kind of kidding around. All talk show hosts are guilty of this more or less and it makes it hard for me to listen to anything else they have to say, even if I already agree with their position.

It is safe to say you are as admired and venerated as any filmmaker alive—among those who have heard of you, of course. Those who do not know your work, and the work of your comrades in the independent film world, are missing experiences that might shake and inspire them.

I have been following the progress of computer graphics since before it was in common use in the movies. I think we are finally at the point where we can mimic with CGI just about anything that you can see in real life. Since about 60 percent of the film is in CG I had a lot of eye candy to soak up. Here are a few CG shots that from Avatar that I thought were particularly well-done.

Jake digs his toes in the dirt. (It may have been done with real feet in real dirt). A bulldozer moves through the dirt and you see the dirt cling to its tracks and fall off the other side as the tracks move around.

Realistic skin is difficult enough to render, but in Avatar you see skin that is wet from rain and sweat. In one shot Jake falls down in some mud and then he attempts to wipe it off his face. Very realistic. There is a shot when he bites a fruit and the juice runs down his chin. There is a shot when Neytiri drinks water from a flower and the water drips off her chin. In another shot Neytiri is putting war paint on Jake’s face. It really looks like viscous paint is being smeared on his skin. His skin and lips respond as if they are really being touched. I don’t know if they used some kind of soft-body collision detection or if someone had to hand animate that. In either case it was well done. During a battle scene Neytiri’s skin is shiny with perspiration, but also bits of dirt and debris stick to the sweat.

I’ve seen other movies where they attempted to animate two CG characters kissing. They got it right in this movie.

Any time a helicopter flew over some foliage the plants whipped about in the prop wash. The clothing and hair on the Na’vi also rippled in the breeze realistically.

A tree falls over in one scene and you see the splintering of the wood. I can’t imagine how that was animated. As the tree falls the air is filled with splinters, dust and leaves. There are many shots where insects buzz about in the background which adds a touch of realism.

CG fire, smoke and water has gotten pretty realistic recently. One especially nice shot is when Jake reaches in a stream to pull out a stick. The water ripples nicely around his hand. There are other shots of realistic waterfalls, water dripping off leaves and waves crashing against rocks along the shore. At one point Jake jumps into a river to escape a predator. The water splashing around looks very convincing and it soaks his shirt and coats his face.

Most of these things have been done before in other movies, but never before have there been so many complex and realistic CG shots in one movie.

After seeing Gollum in The Lord of the Rings and the giant gorilla in Peter Jackson’s King Kong, I began to feel optimistic again. But I had no idea what was in store for me in Avatar. From the moment Jake Sully inhabits his Avatar to the end credits my eyes were glued on the 9 foot tall Na’vi people and their beautiful planet Pandora. Every time the movie cut back to the humans I was a little disappointed. It was as if I was watching the Wizard of Oz that had been intercut with scenes from Kansas. I was filled with so much wonder that I told myself while the movie was still playing that I had to buy the DVD as soon as it was available. The great thing about the Na’vi being computer generated is that the actor’s facial expressions are not hindered by latex prosthetics and colored contact lenses. I didn’t think about the actors having to sit in the makeup chair for two hours every morning before filming started. The people on the screen were the Na’vi. As the actors moved through the jungles of the planet Pandora I didn’t think to myself, “I wonder if this was filmed in Hawaii or Costa Rica” because every twig and leaf was created in a computer specifically for the movie. In essence it was filmed on location in Pandora.

Because every rock, waterfall and living thing on Pandora is so realistic the movie messed with my head. I found myself getting sucked in because I knew that I wasn’t looking at Styrofoam props, matte paintings or people in makeup. The result is a kind of exhilaration I haven’t felt watching any other movie. The Indian director Ram Gopal Varma says it well, “Avatar is by far one of the best films I’ve seen in my life. James Cameron is God. In fact, he’s gone a step ahead of God by building a world that even God couldn’t imagine. After watching Avatar I felt I belong to a primitive filmmaking world.” [from Indiatimes.com]