Creating new Backgrounds

Hey guys good news I just found out a way to replace other backgrounds with bgA_3C02.
So far I have tried it successfully with bgA_3D03 and bgA_A502 and best of all bgB_5302.
The only one I tried it didn't work with was bgA_0102. It crashed at the title screen where this background is being used.

The method I used was:
1. Extract the /Object/bgA_3C02.arc file
2. Open the brres with SZS Modifier and change the texture. Save the file.
3. Rename the brres file to what you want to replace e.g. from bgA_3C02.brres to bgA_A502.bbres
4. Open the brres in a hex editor and search for the line bgA_3C02 you will find two instances "bgA_3C02" and "bgA_3C02_MG_house_MR"
5. Replace the "bgA_3C02" part with the same title for the target file e.g. change it to "bgA_A502" and "bgA_A502_MG_house_MR"
6. Repack the arc file and rename it if you want. Thats it.

I haven't had a chance to test this method out on the wii (will do tomorrow) but it worked with dolphin and it is a step in the right direction.
The next step is getting transparencies to work.

Wow, great find. Even if we can't get transparencies to work, at least we can use this for B backgrounds, and put A backgrounds in front of it.

Great find indeed. Would you mind posting some example files, like that starry background image? I'd like to do some testing myself.

No problem Splashman here is the starry background image http://www.mediafire.com/?injtkzjn2ew
It's very basic since I just made it to test if it would work. The final one should have more stars and with different colors like the original.

I think the transparency problem might be related to the way the image is stored (see the example below). As you can see the top one which is a texture with transparency is of a different type (RGB5A3) to the bottom one which is the current image (CMPR). One thing that concerns me is the 4 bits per pixel which would mean high levels of compression.



Hopefully we can find a way to change this.

Edit: I was able to change the texture format to RGB5A3 using Smashbox 0.57 (didn't work with BrawlBox). But I think it might have messed up the model since the model doesn't open in SZS Modifier and it causes a memory address error in Dolphin.