Hi guys.
I need to grab an non-AA image as fast as possible with Houdini. I know that it is possible to use viewwrite command for that. But i can't fully disable anti aliasing. I also tried Open GL node but it also has some kind of AA in it.
I can disable AA in Mantra but it takes around 15 sec to render the frame (1280x720, no lights, only vertex-colored meshes. Basically, 20 spheres in the frame). And i need to do it faster. Maybe to spend 1s for 1 frame.
Do you have any ideas?

4x AA is no AA now. that's as fast as it gets. I imagine the draw time is trivial compared to the time it takes to save an image. Unless your scene is heavy.

Hi, jsmack.
Actually, some AA is always present in viewport and in viewport screenshot made with viewwrite even with -q 0 flag.
Now, I'm trying to use OpenGL rop node. And i get strange result. Top picture disables High Quality lighting and i get nice flat colors but with AA. The lower picture enables High Quality lighting and with 1 sample i have no AA but shaded colors. And what i need - is flat colored picture(output of vertex color) with no AA. any ideas?
PS: I am able to get needed result using Mantra + diffuse image plane. But mantra takes around 15sec per frame. While sreenshot or OpenGL are less than 1 sec.

That's what I said, it doesn't go lower than 4X. It is always on. It looks like a bug that HQ lighting is breaking the edge anti-aliasing and turning off the constant shading. In 18 this doesn't happen for me. HQ looks the same as normal for constant shaded.

Why do you want to turn it off?

If you download houdini 16.5 or lower, you can turn off AA.

Edit:
looks like in 16.5 clipping edges are not AA, but edges formed by face intersections are.

I want to define which objects are actually visible from the camera and which - are not. Maybe there is some other way to do that. But I thought that i can assign different colors to them - render/screenshot them and compare