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[1.18] Collisionless block that slows like Soul Sand


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I'm looking to create a block like cobwebs that you can walk through which slows you, but I would like it to slow in the manner of soul sand, not of cobwebs. The difference is that cobwebs (or anything using Entity#makeStuckInBlock) set the Entity's deltaMovement to zero. This means that you move much slower, you cannot jump a full block, and your falling is slowed, even if you set the vertical speed multiplier to 1 and the horizontal multiplier close to 1. For example, if I take the cobweb approach with tweaked values as follows:

public void entityInside(BlockState state, Level level, BlockPos pos, Entity entity) {
	entity.makeStuckInBlock(state, new Vec3(0.95D, 1.0D, 0.95D));

This results in a block that slows by much more than the stated 5%, reduces the jump height to less than one block, and reduces your fall speed significantly when you land in it, removing all your momentum.

I would like my block to behave like soul sand, where it does not affect jumping and the speed multiplier translates directly to the resulting speed. However, soul sand works by setting the Block's speedFactor, and only the speedFactor of the block the entity is standing on affects the entity's speed, so I cannot simply set the speedFactor.

Is there a way I can create a block that you can walk through, slowing you down, yet you can still jump your full jump height and walking through does not kill your momentum like cobwebs do?

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Of course, thanks. 

Here's the solution for future reference:

    public void entityInside(BlockState state, Level level, BlockPos pos, Entity entity) {
        double factor = 0.4;
        entity.setDeltaMovement(entity.getDeltaMovement().multiply(factor, 1.0D, factor));


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