Ok, so THIS is a perplexing one....

I thought it might have been my coding, however, it happens in the included motionblur.pd file in the gem examples folder(7.texture 8.motionblur.pd)

the effect works perfectly in the default screen size, however, upon enlarging the screen, the effect totally(seemingly) disappears.

I have tried resizing square from 4 to 8..to 10...............clicking the different messages (0 0, 500 500 respectively), all to no avail..

maybe it's just my computer, who knows..

Running pd ext 0.43.4 on Windows 8, ASUS F550l

Maybe someone could confirm if this happens on their setup as well and/or tell me something I am missing?

Thx in advance.

Edit: when in doubt, always consult the brain...

I started playing around with the window resolution message, (inlet 3 in [pix_snap2tex]) and got some results entering 1366 768 as that's my resolution..... changing the square size also helps...

Now.....here is my question, for a live performance, if I was projecting or mapping GEM, it almost definitely would be better to project from full screen mode as I would be getting higher resolution correct?

probably an obvious question, can't hurt to ask though

@lovelovevideo Always best to output your image at the resolution of the projector...... which means filling the output screen with your image so that every pixel is addressed...... so full screen....
If you don't then the projector will either not show the image full screen, or it will have to fill in the missing pixels as best it can.
If your original image is not at the correct resolution...... i.e. a low res video..... then the graphics card will do that work. All of the GEM effects are rendered in real time by the graphics card using OpenGL. So the patch sends instructions to the graphics card about how to render the image. The GEM objects don't do the work themselves.

I would guess that the graphics card, or especially opengl, does not know how to calculate the motion blur of "in between" pixels.
The same is true for your computer generated image as it is for video. For best quality it should be rendered at that same resolution so that you don't have jagged lines and edges......... and at a high enough frame rate that the image doesn't "stagger".....
That is why it is important to have a fast video card with enough video ram. All computer games are doing exactly what you are trying to do....... and more so of course.......
But the newer intel on-die chips..... HD4000+...... are pretty powerful...... even the HD3000 can probably do what you are asking...
David.

@whale-av Okkkk...

a year later and still working on this project..

In retrospect, changing the resolution to my screen size created a really nice effect, however, it is NOT the same horizontal blur that occurs in the 500 by 500 standard square in the example....

They are more copies of the teapot on the depth plane..

Can you or anyone confirm that you can get the motionblur example working in fullscreen mode?

It's a bit misleading that the description included is fullscreen motionblur

I'm now working with 1920 x 1080, changing to this resolution(in snap2tex) doesn´t help at all in the included example. I'm also now using a GTX 1070 so definitely not the problem.