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Is there a way to change it in the editor, because when i try to import a certain resource it wont let me change the Transparency, and I don't know how to fix it, its a png.
If your png file has an 'alpha' channel (transparency), the game will not ask you to select a color to map to transparent. You either need to erase that color from your image, save it without an alpha channel, or save it as a .gif or .bmp then save it again as a .png (this should remove the alpha channel). DON'T save it as a .jpg, the colors get messed up.
I am using GIMP, is there any way i can set it in the editor program myself, as a semi transparent, so rmxp will recognize it as such, because the object IS semitransparent, but rmxp doesn't recognize it as such.
In GIMP, to erase the background:
Make sure you have an alpha channel (Layer -> Transparency -> Add Alpha Channel)
Then, erase the background. (Select regions by Color, Control-K)
To make your image semi-transparent:
Pick the Eraser tool.
Set the Opacity to less than 100% (you'll have to experiment)
"Semi-erase" your image. Hold down the mouse button, and it won't over erase.
You can also do this with a layer mask. but it's a little trickier.
If your png file has an 'alpha' channel (transparency), the game will not ask you to select a color to map to transparent. You either need to erase that color from your image, save it without an alpha channel, or save it as a .gif or .bmp then save it again as a .png (this should remove the alpha channel). DON'T save it as a .jpg, the colors get messed up.