Diagonal movement into difficult terrain?

[SheckyS]

So I play on a square grid using the 5/10 rules. That is, the first diagonal move costs 5 feet and the second costs an additional 10 feet.

But what happens if the second diagonal move is into a square that is rough terrain and therefore already would have cost 10 feet? Does it double to 20? Or does it stay 10?

Same/similar question if I am moving through an ally's square? That already costs 10 as though it was difficult terrain? So do I add an extra 5 for 15? Or is it 20? Or just 10?

 

[LordEntrails]

What do you want it to be? You table, your rules.

Me, we use the 5/10 diagonal as well. And when a square is difficult it costs double, so moving into a difficult terrain square costs 10 or 20, depending. My table, my rules

EDIT: Err, well, in 4E it didn't double, it just added an extra 5ft so it would be 10/15. But I don't remember what I do of the 2...

 

[77IM]

You have to break out the calculators and the Pythagoran Theorem.

For realism!

 

[77IM]

In all seriousness, if you want the shape of the resulting area to be geometrically similar between regular terrain and difficult terrain, then difficult diagonal movement must cost 10/20. Difficult terrain cuts your effective rectilinear movement range in half, so it ought to also reduce your effective diagonal movement range in half.

 

[GMMichael]

[TABLE="class: grid, width: 500, align: center"]
[TR]
[TD]15
[/TD]
[TD][/TD]
[TD]10
[/TD]
[TD]
[/TD]
[TD]30
[/TD]
[/TR]
[TR]
[TD][/TD]
[TD]5
[/TD]
[TD]5
[/TD]
[TD]15
[/TD]
[TD]
[/TD]
[/TR]
[TR]
[TD]10
[/TD]
[TD]5
[/TD]
[TD]You
[/TD]
[TD]10
[/TD]
[TD]20
[/TD]
[/TR]
[TR]
[TD][/TD]
[TD]5
[/TD]
[TD]10
[/TD]
[TD]15
[/TD]
[TD]
[/TD]
[/TR]
[TR]
[TD]15
[/TD]
[TD][/TD]
[TD]20
[/TD]
[TD]
[/TD]
[TD]30
[/TD]
[/TR]
[/TABLE]

 

[Satyrn]

So I play on a square grid using the 5/10 rules. That is, the first diagonal move costs 5 feet and the second costs an additional 10 feet.

But what happens if the second diagonal move is into a square that is rough terrain and therefore already would have cost 10 feet? Does it double to 20? Or does it stay 10?

Same/similar question if I am moving through an ally's square? That already costs 10 as though it was difficult terrain? So do I add an extra 5 for 15? Or is it 20? Or just 10?

I'd try doubling it for a couple fights, and then try making it just +5 for a couple more fights, and choose the one that works best for the table.

Or, just check the DMG. It might have a suggestion you could go with.

 

[Li Shenron]

So I play on a square grid using the 5/10 rules. That is, the first diagonal move costs 5 feet and the second costs an additional 10 feet.

But what happens if the second diagonal move is into a square that is rough terrain and therefore already would have cost 10 feet? Does it double to 20? Or does it stay 10?

Same/similar question if I am moving through an ally's square? That already costs 10 as though it was difficult terrain? So do I add an extra 5 for 15? Or is it 20? Or just 10?

I think it should be 20.

If moving diagonally is treated as moving alternately 5 and 10, then the second time your actual moved distance is 10 and for each 5 the difficult terrain costs 10.

 

[77IM]

Holy crap, [MENTION=6685730]DMMike[/MENTION] got table code to work!!! Is there a tutorial or something that you can share?

 

[GMMichael]

Just keep clicking on stuff until it looks good.

 

[Nutation]

A normal diagonal is 1.5 squares. The 5/10 convention is just to round that to integers.
A difficult diagonal is 3 squares (15 ft). That is regardless of whether you've already covered an even or odd number of normal diagonals, which are tracked separately. DMMike is showing you the correct chart.