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Question by xiak · Jan 22, 2018 at 02:15 PM · imagesefficient

Quickly cycle through a series of images

I want to quickly cycle through a large number of simple images, somewhere in the region of 500. I'm aiming for showing a new random image at the rate of 3 or 4 per second. The images are simply a random positioning of dots and I'm trying to create something similar to a white noise effect. This will have to run on a tablet device so I'm looking for an efficient way to store and show the images in quick succession.

Can anyone suggest the best approach to implement this?

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Answer by Dray · Jan 22, 2018 at 02:37 PM

Pack your textures into an texture atlas and animate it by moving the atlas texture around.

(Look at this random example atlas I copied from google):

alt text

You could also generate the texture "live" on the device using an actual noise implementation, I think 0,25 - 0,33 seconds are enough to generate a noise texture on a tablet nowdays

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avatar image xiak · Jan 22, 2018 at 08:18 PM 0
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Thanks! I'll try this approach.

avatar image Dray xiak · Jan 23, 2018 at 08:22 AM 0
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Np :) let me know if you run into issues, I might even have an old implementation I can dig out later.. hopefully :D

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Answer by Neamtzu · Jan 22, 2018 at 02:29 PM

Add all your images in Resources folder and load them using Resources.Load at runtime. After you load a new image, unload the old on from RAM using Resources.UnloadUnusedAssets. If Resources.Load is causing frame drops, you can try to load the new image using Resources.LoadAsync

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avatar image Hellium · Jan 22, 2018 at 02:32 PM 1
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https://unity3d.com/fr/learn/tutorials/temas/best-practices/resources-folder

2.1. Best Practices for the Resources System

Don't use it.
avatar image Neamtzu Hellium · Jan 22, 2018 at 02:36 PM 0
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In this case I don't see a reason why not to use the Resources System.

avatar image Hellium Neamtzu · Jan 22, 2018 at 03:04 PM 0
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Check 2.2. Proper uses of the Resources system of the provided link.

avatar image xiak · Jan 22, 2018 at 08:17 PM 0
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Thanks, this sounds like the easiest approach but I'm worried about performance.

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