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Help! I don't understand adding Chunks! (Sonic 1)

Discussion in 'Engineering & Reverse Engineering' started by DaBigJ, Mar 30, 2025.

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  1. Mar 30, 2025 #1
    DaBigJ

    DaBigJ

    The Bubsy fan of all time Member
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    So picture this, I made a chunk that is essentially a reskin of a Star Light chunk for Green Hill Zone. I import it into SonLVL and place it down, but it has no collisions and I have no idea how to make it work.

    Is there a guide I am missing for chunk importing? If anyone could give pointers on how to handle chunks please let me know, I'd greatly appreciate it.
     
  2. Apr 1, 2025 #2
    MainMemory

    MainMemory

    Has-Been Modder Tech Member
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    SonLVL, when provided with just a single image, will not set up any collision data for a chunk, rather than assuming every non-transparent pixel is intended to be solid. There are two ways to assign collision to an imported chunk:
    1. Create a copy of the image with the solid areas colored black and non-transparent areas colored magenta, named filename_col.png, and import the main chunk image again. If you export chunks with the "Export art+collision+priority" option enabled you'll see how this is meant to be set up.
    2. Assign collision manually in SonLVL's block/chunk editors.
     
  3. Apr 2, 2025 #3
    DaBigJ

    DaBigJ

    The Bubsy fan of all time Member
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    I'll give either one of these a try, thank you so much