Debris Explosion

[mohammadzand]

Hey. I want to make Debris Explosion like the 1917 movie that I uploaded. 

I shared a simple method and I want to use grain or vellum grains because I need the same particles to stick together like the movie.  

I made the second scene but I think It's not good. 

please check my project and tell me how can I achieve it.

Debris_Explosion.hip

Edited May 24, 2024 by mohammadzand

[paranoidx]

Hey there!

1. The comparison isn't quite right. The scales are totally different, and the timing of your explosion needs a bit of adjustment. The reference explosion happens very quickly, but the debris falls more slowly due to it breaking into smaller pieces. It may seem like it's moving slower, but that's just because the debris is separating into tiny bits.

2. In your explosion, also, when you compare the size of the rocks next to the road, the pieces fly too far in just a few frames. I measured this using the size of a sheep for fun!
3. The reference only involves rigid body dynamics (RBD) with small pieces of geometry acting as debris. You can create a lot of these effects using the Bullet Emit technique.
4. Sparks only appear where there is metal or steel material in the explosion.

5. The frame rate is also slightly different, so if you measure the timing based on their video, it might seem like your day is longer.

When it comes to the explosion scene in the trench, I recommend looking for real references from World War 1. Try to adjust the frames to match a 24fps for the best effect. The movie reference seems closer to the camera lens, so it should appear faster, but it actually looks a bit slow. This could be due to high-speed shots, a different frame rate, or just some movie magic.
Since your explosion isn't as close to the lens, it should actually be a bit slower in timing compared to what you're currently doing - and the size. This adjustment will help things look more natural and in sync.

 

Edited May 27, 2024 by paranoidx
add reference video and note

[mohammadzand]

.

Edited May 27, 2024 by mohammadzand

[mohammadzand]

7 hours ago, paranoidx said:

Hey there!

1. The comparison isn't quite right. The scales are totally different, and the timing of your explosion needs a bit of adjustment. The reference explosion happens very quickly, but the debris falls more slowly due to it breaking into smaller pieces. It may seem like it's moving slower, but that's just because the debris is separating into tiny bits.

2. In your explosion, also, when you compare the size of the rocks next to the road, the pieces fly too far in just a few frames. I measured this using the size of a sheep for fun!
3. The reference only involves rigid body dynamics (RBD) with small pieces of geometry acting as debris. You can create a lot of these effects using the Bullet Emit technique.
4. Sparks only appear where there is metal or steel material in the explosion.

5. The frame rate is also slightly different, so if you measure the timing based on their video, it might seem like your day is longer.

When it comes to the explosion scene in the trench, I recommend looking for real references from World War 1. Try to adjust the frames to match a 24fps for the best effect. The movie reference seems closer to the camera lens, so it should appear faster, but it actually looks a bit slow. This could be due to high-speed shots, a different frame rate, or just some movie magic.
Since your explosion isn't as close to the lens, it should actually be a bit slower in timing compared to what you're currently doing - and the size. This adjustment will help things look more natural and in sync.

 

appreciate you for your complete and useful explanation.