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Showing results for tags 'timewarp'.
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I have sim cache in linear timespace and a timewarp curve in .chan file from nuke, and I want to get difference of time change from it to use as a multiplier for increasing velocity in motion blur. For now I`m stuck on my on e solution: I use slope node on timewarp to calculate the differences in time change, but I`m not sure that this is a right solution. frame_camera_expChan.chan timewarp.hip
Hey guys. how would you approach a slow motion shot? I have to do a fluid sim, which has to be slowed down drastically. so here is the information I have available: I have a raw plate which is 1600 frames long super slow motion. The plate is being retimed to 129 frames in nuke. After the retime the first 35 frames is normal speed, and then it slows down until it hits the slowest point available with the fps it was shot at (speed of the raw plate). So far my initial thought is to Sim the whole thing to the raw plate and then apply the retimed curve afterwards, but I have such a hard time getting my sim to look correctly when I sim it this slow, and also that means I have to sim 1600 frames. The other thing is that I have currently slowed down the timescale on the Dopnet for my sim to get it as slow as I need, and as soon as I do the look on my sim totally change. I figured it is because the timescale is not truly a timescale that can be used for this, but this is as far as my knowledge goes with regards to slowmotion stuff. So is there anyway I can sim at regular speed, so I maintain proper force appliance etc (timescale 1 on my dopnet) and then extract some kind of information (I am thinking substeps maybe?) that can give me the in between frames information (maybe @P?) and then slow it down that way? let me know what you guys think, or which approach you would use for something like this. Cheers
I have a flip + whitewater sim which I've cached with all properties, now I'm slowing it down 4x (i.e. timewarp frames 1...6000 stretched to 1...24000) and I'm using timeblend (i.e. cache -> timeblend -> timewarp -> NULL_OUT) Most of it is working, but for some reason there are some artifacts, some (very few) particles are not being interpolated. You can see what I mean in these videos (I'm rendering as seq of tiff with alpha and I've tried 3 diff alpha matting methods -ignore, straight, premult - and it's noticable on all). https://www.dropbox.com/sh/wo2fm2qjd87vhbw/AACkLgoOCqFzehwz8pLyLEfGa?dl=0 (especially obvious when watched frame by frame). in the link above I've also included a tiny segment of my raw data and a minimal hip file which shows how I'm doing the timewarp+timeblend I have no idea what this is, or even how to debug it. Any ideas welcome!
Is there a posibility to calculate substeps on a cache file? I have tried to used time warp for stretching the cache for example from frame 1 in to -> to 1 to 50 but it just gave me frame first or the second frame. for example: i shatter a glass thats falling using fractureparms with 25fps. now i want to use it at 300fps or also i want to use the cache to be a collision on later aplied water simulations thnx http://youtu.be/h2GupSHP_oM