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View Full Version : Is there a way I can make a cool LiDAR video like this?...



alexjose
12-17-2014, 09:37 AM
I need to make a video like this...
https://www.youtube.com/watch?v=nXlqv_k4P8Q

I think it'll probably be something like using a textured light, maybe one that radiates out lines. How would you do this? Thanks

ernpchan
12-17-2014, 10:40 AM
First thing that came to mind was parenting a texture to the car.

RebelHill
12-17-2014, 10:49 AM
Ripples texture on everything with the car set as the position reference item and the light source parented to the car.

pinkmouse
12-17-2014, 11:21 AM
Or if you want to do it with geometry:

126129

pinkmouse
12-17-2014, 12:14 PM
Or the old spinning light trick, with loads and loads of motion blur...

126132

gives you:

126133

shrox
12-17-2014, 12:27 PM
Spinning lights will work best I'd say.

alexjose
12-17-2014, 05:18 PM
Thanks guys! That looks pretty good pinkmouse. Is there a tutorial for doing a spinning light like that?

pinkmouse
12-17-2014, 06:09 PM
Google "spinning light trick", I'm sure there are. ;)

But here's the scene anyway:

XswampyX
12-17-2014, 07:45 PM
Or use a gobo...

http://forums.newtek.com/attachment.php?attachmentid=126145&d=1418870675

126145

pinkmouse
12-18-2014, 02:20 AM
Yeah, tried that, but wasn't that happy with the limited beam angle, and the distortion you get when you raise up the light to get better coverage.

alexjose
12-22-2014, 08:20 AM
thanks so much!

alexjose
12-22-2014, 04:15 PM
Hey Pinkmouse, can you tell me the basics of how you did your example with geometry? It looks really good too

alexjose
12-22-2014, 04:24 PM
Actually I think I figured it out, thanks

pinkmouse
12-22-2014, 05:44 PM
No problem. Just post a pic or two when you're done, okay? :)

alexjose
12-23-2014, 08:21 AM
will do! :)

alexjose
12-23-2014, 12:05 PM
So you just basically made a ball and subtracted arrayed boxes from it to come up with the object and are having shadows from that as the lidar light, correct? I'm trying to get much thinner lines but not having much luck doing that technique. I'm also playing around with a gobo method and an image sequence so the lidar waves can radiate out over time but like you said i really dont like the limited beam angle

XswampyX
12-23-2014, 12:50 PM
Don't erase parts of the sphere, use an image/texture as a transparency map on it. Make it unseen by camera and put a point light in it.

alexjose
12-23-2014, 01:34 PM
Thanks swampy!

alexjose
12-24-2014, 10:19 AM
I ended up needing to do a flash LiDAR example instead which is more just dots instead of lines. I used a procedural dots texture for the transparency texture. Heres what I've got so far -

126265

I dont like the distortion of the dots at different angles. I'd also like for the dots to move out from the center over time. Anyone know of a better way to go about this?

XswampyX
12-25-2014, 01:24 AM
I ended up needing to do a flash LiDAR example instead which is more just dots instead of lines. I used a procedural dots texture for the transparency texture. Heres what I've got so far -

126265

I dont like the distortion of the dots at different angles. I'd also like for the dots to move out from the center over time. Anyone know of a better way to go about this?

Use more geometry for your gobo sphere, and move the light inside the sphere up -> down, but leave the sphere alone.

alexjose
12-29-2014, 02:01 PM
Thanks!