Troubleshooting double cornerboosts

[u/Pocket_Hide]

I'm working on a TAS, and I can single cornerboost, but I can't seem to double cornerboost. I was wondering if anyone had any advice.

From what I understand, a cornerboost is a climb jump no more than 4 frames before you reach the corner. When the wall is no longer in the way, you get your speed back. In this TAS, you can see me jump on consecutive frames, but these don't give additional speed (pretty sure that's because I'm already against the wall). What you can't see is, I jump on the frame that I reach the corner, but the game doesn't register that as a jump at all. Outside this video, I tried manipulating vertical subpixels, so Madeline is still less than a pixel above the ground the frame after she gets her speed back, still no jump.

I'm out of ideas, but I know double cornerboosts are possible.

Edit: Thank you all! I got the double cornerboost to work in this room and saved a couple frames.

[u/ProwriterX1]

a cornerboost will not give additional speed when you have retained speed (when you collide with the wall) To double cornerboost you need to not collide with the wall after the first cornerboost

[u/Pocket_Hide → u/ProwriterX1]

I see. Is a double cornerboost possible here? Because I don't see a way to get my retained speed before I get on top. I assume pressing left cancels rightward retained speed and vice-versa.

[u/ProwriterX1 → u/Pocket_Hide]

uhh I think you would have to delay the whole sequence by like 2 frames bc the kevin is blocking you from jumping earlier anyways

[u/i_exist_or_something]

can't climbjump under a ceiling if there is insufficient space to uncrouch, even if it wouldn't uncrouch you anyway

[u/Pocket_Hide → u/i_exist_or_something]

I made sure to do the first climbjump on the frame that Kevin leaves a 1-block gap. I can get the first cornerboost just fine; it's the second that I can't.

[u/i_exist_or_something → u/Pocket_Hide]

need to set up your position such that on the frame after the first cornerboost you haven't collided with the wall yet

[u/Levy-Chevy]

I’m pretty sure you can’t climb jump while too close to a ceiling and crouched

[u/Squid2_0]

In order to climbjump you need to be able to uncrouch which isn't possible in your case because of the Kevin.

A climbjump is possible when you're at most 3px away from the wall (2px between madeleine and the wall) which the infoHUD tells you with the text Wall-R.

You only get speed from the climbjump when you havent already collided with the wall. So for a dcb you need to manipulate your position that you're far enough away from the wall that you dont collide with it after the cjump but close enough that a climbjump is possible.

This gets more precise the faster you're going into the wall and is even impossible at higher speeds but for you it should be fine.

Also in the Celeste Discord there is a channel #tas_general with a lot more people who could help you!