Let’s destroy this place !
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The idea is to generate a voxel island and create a cataclysm that destroys the whole place. For now, I want to spawn a black hole attracting each cube. I already have the generated voxel island with niagara (it samples a heightmap). At first I’ll improve the generation and create a water level system. It’s really rough for now.
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I’ve made a water level system. I’ve reused the island generation system to create water only in places where a island cube was not generated. I’ve also made generated particles on edges of the surface, the water is not filled, it was essential to not have a weird rendering with water cubes transparency (also it’s way better for performances).
I’ve also adjusted scene ambience with some volumetric fog and raytracing (It’s inspired on Lego Builder’s Journey rendering)
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EXPLOSION !!! è.é
I’ve made a lot of tests with physics. I wanted to make a black hole attracting particles but explosions are way funnier x)
For now it’s just a collision box retaining particles inside with some increased drag when particles fall into water. I wanted to make particles collide each other with simulation stages but I think it’s not really interesting to go that far (and it will be really expensive). Next step, I’m gonna make thos particles collide with the island, I can do this sampling the island heightmap and substracting the hole area calculating collisions into a the explosion sphere.
Lastly I’m gonna make a falling nuclear bomb into the center of the island.
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MOAR EXPLOSIONS !!!
Here’s my progression for today. I’ve made a bomb particle system that fall on the island and triggers a huge nuclear explosion.
I’ve tried to make the explosion the most impactful as possible adding an anticipation frame when the bomb collides with the ground.
For now, explosion is a glowing cube, a WIP nuclear mushroom + some screen shakes and post processing effets. Everything is animated in a blueprint (with timelines).
Next step, I’m gonna make this nuclear mushroom more complete and more beautiful.
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The bomb is also made with cube particles.
I made a module to spawn particles on a line (between 2 points) and used the normalized execution index to set the color and the scale.
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I’ve made a lot of improvements 
Now I have an entire nuclear mushroom !
I also added some collisions on the island and the crater. Instead of calculating collisions between each cubes (what would be expensive), I sample my height map and subtract the explosion crater with a sphere collision calculation to make my particles collide with the final island shape. It’s not 100% accurate but it works pretty well without destroying performances.
Also to improve anticipation and stylize it a bit more, I’ve added those camera plane relative flares on my rocket reactor, on the implosion and at the very beginning of the final blast.
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Some little adjustments. I’ve made a island spawn effect and decreased luminosity to make rocket flares more visible.
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This is lovely! The spawn effect really ties the whole thing together 
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Here’s the final version
I’ve polished it a bit adding some camera motion and a cube lens flares
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