Ok not sure if this is correct place to post, but hours of searching and i never found an answer to this did read a few modelers having same problem.
So before hours or days in my case are spent pulling out hair wanted to offer a small grasp of information i stumbled across.
This is not about getting custom decals applied in game through galaxy or applying them to custom models, This is about decals becoming distorted when you try to play with them in game after exporting from max, or mapping out your own decal placement on sc2 units through 3DS Max.
Things i will be using 3Ds max (this was done in Version 2010), galaxy editor(for testing), some sort of decal image, a grasp of mapping channels.
I'll assume you already have your textures, diffuse etc all mapped out how you want it and are try trying to figure out if the decal is worth that much effort or why it looks all Professional and new in max, but messed up in sc2.
1st
Set up the second mapping channel, uv unwrap set to 2 (using the first as a base e.g. don't reset just switch to 2) select the faces you want as your decal placement and put to one side.
The rest just select all faces, scale, resize to a tiny tiny square and placed in a corner. You don't actually move any polys just shrink them so they will not be effected by decal colours.
Take the Decal placement polys you put to one side and resize, shape to how you want. Make sure textures on mapping - Decal sc2 have been set in the textures so you can see how its placed. once thats done collapse and Export.
2nd
Import the model back into max that you just exported.
Reopen the uv unwrap, set to 2 and you can edit > reset UV now. You should see something completely messed up but within the box still. This is how sc2 would have read the decal placement.
3rd
Do as you please now with what you have, Fix it to how you want the decal to be placed checking how it looks till you have it perfect for your needs.
4th
Collapse the unwrap now and export again, load into galaxy editor and test the placement should be fixed and look like how it was meant to be seen.
Note: I never once opened "2" uv unwraps, or edited the 1st map this was already done previously.
This problem also occurs if you even look or view a sc2's units 2nd map and collapse it again reexport, the decal will be distorted in game.
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Ok not sure if this is correct place to post, but hours of searching and i never found an answer to this did read a few modelers having same problem. So before hours or days in my case are spent pulling out hair wanted to offer a small grasp of information i stumbled across.
This is not about getting custom decals applied in game through galaxy or applying them to custom models, This is about decals becoming distorted when you try to play with them in game after exporting from max, or mapping out your own decal placement on sc2 units through 3DS Max.
Things i will be using 3Ds max (this was done in Version 2010), galaxy editor(for testing), some sort of decal image, a grasp of mapping channels.
I'll assume you already have your textures, diffuse etc all mapped out how you want it and are try trying to figure out if the decal is worth that much effort or why it looks all Professional and new in max, but messed up in sc2.
1st Set up the second mapping channel, uv unwrap set to 2 (using the first as a base e.g. don't reset just switch to 2) select the faces you want as your decal placement and put to one side. The rest just select all faces, scale, resize to a tiny tiny square and placed in a corner. You don't actually move any polys just shrink them so they will not be effected by decal colours.
Take the Decal placement polys you put to one side and resize, shape to how you want. Make sure textures on mapping - Decal sc2 have been set in the textures so you can see how its placed. once thats done collapse and Export.
2nd Import the model back into max that you just exported. Reopen the uv unwrap, set to 2 and you can edit > reset UV now. You should see something completely messed up but within the box still. This is how sc2 would have read the decal placement.
3rd Do as you please now with what you have, Fix it to how you want the decal to be placed checking how it looks till you have it perfect for your needs.
4th Collapse the unwrap now and export again, load into galaxy editor and test the placement should be fixed and look like how it was meant to be seen.
Note: I never once opened "2" uv unwraps, or edited the 1st map this was already done previously.
This problem also occurs if you even look or view a sc2's units 2nd map and collapse it again reexport, the decal will be distorted in game.