How to make a sphere in MCreator

making a sphere shaped hole requires lots of math. you should google circle/sphere algorithms and try to implement it in your explosion procedure.

i made it using lots of code.

something like this:

public class SphereExplosion {
	protected World world;
	private int centerX;
	private int centerY;
	private int centerZ;
	private int radius;
	private int tX;
	private int tY;
	private int tZ;
	private int tR;
	private boolean mobGriefing;
	private float fireChance;
	private int tick;

	public SphereExplosion(World worldIn, int x, int y, int z, int radiusIn, float fireChanceIn, boolean soundIn) {
		this.world = worldIn;
		this.centerX = x;
		this.centerY = y;
		this.centerZ = z;
		this.radius = radiusIn;
		this.fireChance = fireChanceIn;
		this.sound = soundIn;
		this.tY = radiusIn;
	}

	protected void onUpdate() {
		if (!this.shouldExecute()) {
			return;
		}
		
		super.onUpdate();
		
		if (this.sound && this.tick % 2 == 1) {
			this.world.playSound(null, this.centerX, this.centerY, this.centerZ, SoundEvents.ENTITY_GENERIC_EXPLODE, 
			  SoundCategory.BLOCKS, 10.0F, (1.0F + (this.rand.nextFloat() - this.rand.nextFloat()) * 0.2F) * 0.7F);
		}
		
		this.doOnTick(this.tick);
		
		for (int i = 0; i < 10000;) {
			BlockPos posList[] = {
				new BlockPos(this.centerX + this.tX, this.centerY + this.tY, this.centerZ + this.tZ),
				new BlockPos(this.centerX - this.tX, this.centerY + this.tY, this.centerZ + this.tZ),
				new BlockPos(this.centerX + this.tX, this.centerY + this.tY, this.centerZ - this.tZ),
				new BlockPos(this.centerX - this.tX, this.centerY + this.tY, this.centerZ - this.tZ),
				new BlockPos(this.centerX + this.tZ, this.centerY + this.tY, this.centerZ + this.tX),
				new BlockPos(this.centerX + this.tZ, this.centerY + this.tY, this.centerZ - this.tX),
				new BlockPos(this.centerX - this.tZ, this.centerY + this.tY, this.centerZ + this.tX),
				new BlockPos(this.centerX - this.tZ, this.centerY + this.tY, this.centerZ - this.tX),
				new BlockPos(this.centerX + this.tX - 1, this.centerY + this.tY, this.centerZ + this.tZ),
				new BlockPos(this.centerX - this.tX + 1, this.centerY + this.tY, this.centerZ + this.tZ),
				new BlockPos(this.centerX + this.tX - 1, this.centerY + this.tY, this.centerZ - this.tZ),
				new BlockPos(this.centerX - this.tX + 1, this.centerY + this.tY, this.centerZ - this.tZ),
				new BlockPos(this.centerX + this.tZ, this.centerY + this.tY, this.centerZ + this.tX - 1),
				new BlockPos(this.centerX + this.tZ, this.centerY + this.tY, this.centerZ - this.tX + 1),
				new BlockPos(this.centerX - this.tZ, this.centerY + this.tY, this.centerZ + this.tX - 1),
				new BlockPos(this.centerX - this.tZ, this.centerY + this.tY, this.centerZ - this.tX + 1)
			};
			for (BlockPos pos : posList) {
				IBlockState blockstate = this.world.getBlockState(pos);
				if (!this.world.isAirBlock(pos) && blockstate.getBlockHardness(this.world, pos) >= 0.0F) {
					if (this.mobGriefing) {
						blockstate.getBlock().dropBlockAsItemWithChance(this.world, pos, blockstate, 0.5F / this.radius, 0);
						this.world.setBlockToAir(pos);
					}
					if (this.particles) {
						((WorldServer) this.world).spawnParticle(EnumParticleTypes.EXPLOSION_LARGE, pos.getX(), pos.getY(), pos.getZ(), 1,
								1.0D, 1.0D, 1.0D, 3.0D, new int[0]);
						((WorldServer) this.world).spawnParticle(EnumParticleTypes.SMOKE_LARGE, pos.getX(), pos.getY(), pos.getZ(), 1, 1.0D,
								1.0D, 1.0D, 0.0D, new int[0]);
					}
					i++;
				}
			}
			int i1 = (int) Math.round(Math.sqrt(this.radius * this.radius - this.tR * this.tR));
			this.tY--;
			if (this.centerY + this.tY >= 255) {
				continue;
			}
			if (this.tY < -i1 || this.centerY + this.tY < 0) {
				this.tY = i1;
				this.tZ++;
				this.tX = (int) Math.round(Math.sqrt(this.tR * this.tR - this.tZ * this.tZ));
			}
			if (this.tZ > (int) Math.round(this.tR / 1.41421356D)) {
				this.tZ = 0;
				this.tX = ++this.tR;
			}
			if (this.tR > this.radius) {
				if (this.mobGriefing && this.fireChance > 0.01f) {
					ProcedureAoeCommand.set(this.world, (double)this.centerX, (double)this.centerY, (double)this.centerZ, 0d, (double)this.radius*1.1d)
					  .setFire(this.fireChance);
				}
				this.setDead();
				return;
			}
		}
		
		this.tick++;
	}
	
	// some other methods ...
}

but you'll have to modify it to fit your needs. you'll need to tie it to some object that ticks like an entity.

it would be quite difficult if you don't know how to code.

i would recommend you create a living entity element in mcreator, lock and edit the element code, change the class to extend Entity instead of LivingEntity, remove the unnecessary code that handles entity rendering and living entity methods, implement that piece of code into entity class, override the setLocationAndAngles method to also set the center point at the x, y, z, and set radius the same as rotaionYaw. this way you can just call the "spawn entity with position and rotation" code block in other mcreator procedures to create the explosion.