Tip: Don't edit the 8x8 tile of the upper right hand corner of the sideways walking Koopa Troopa in GFX01 (unless you want your coin sparkles to look glitchy).
How do i add a new gfx that i want to use on a custom block that i downloaded. I dont want too keep taking the gfx that are in the game already (like cement block gfx) and put on the block that i want it on..
The only way to insert new graphics into your hack without overwriting the already existing ones is using ExGFX. If you don't know how ExGFX works, this tutorial should explain it.
i know how exgfx is imported and edited in yychr but the thing is.. how do i ADD the file that i want to draw on in yychr.. do i copy a gfx file and then just overwrite it with my own gfx and change the name?
Yep, that's pretty what you do. Copy any existing GFX file and rename it to ExGFX### where ### is a hexadecimal number from 80-FFF. Paste your graphics onto the graphics file and use it for the level you want to use those custom graphics.
Basically, you'll want to open up the 8x8 tile editor and the 16x16 tile editor (aka the Map16 editor). Find your GFX that you want in the block in the 8x8 tile editor. Now scroll down in the Map16 tile editor to where you want the block to be. Click on it and click on "Edit 16x16 tile attributes". Now, to find what tile numbers to put in the four boxes, mouse over the tiles in the 8x8 editor. The tile numbers will appear at the bottom. Click OK and right-click to paste the new tile. Now press F9 to save your changes.
Hope that helped! If you need further clarification, just ask.