.TGA collision mask

[001Law]

Hey everyone.
Just got ahold of 001 via the recent steam sale. Everything looks great!

My question is a weird one. I came across some tiles that I quite like.
The problem with them is in the way they have setup the collision.
They have an .JPG image for each tile, with a .TGA image matching the filename - which contains black and white indicating a collision mask.
I used this system myself in the old SDL software rendering days, so I get what they are up to.
Trouble is, I don't really have a means anymore of applying the .TGA collision to the image tiles and render out just the vital pixels for use in 001. (The source image does not respect transparency)

Anyone out there encounter this before? Is there a slick way to do this in photoshop or elsewhere that I haven't been able to google. (This is a hard question to google!)

Here is an example set for you to see:

diag1.jpg (804 Bytes) Viewed 659 times

(this is the .TGA converted because the board does not accept .TGA)

_diag1.jpg (9.74 KiB) Viewed 659 times

The source image does not have a transparent or magenta or even solid background in some cases.
The only way to achieve transparency is to go in and paint it by hand, or apply it with the included .TGA, but I don't know how to accomplish this.
Once I have the background removed, I can setup the collision within 001 just fine.
Any advice?

Thanks in advance!
Lawrence

[evs]

i dont know about photoshop, never used it. but i like SerifDrawplus. by taking out all the colour and then making the origional grey bit transparent you would be left with the lower image. takes about 3 seconds. that is now a legacy program im told and only runs on windows 7. they have a new windows 10 drawing program from the same company called affinity though. id say the same process should be available in photoshop. draining the colour to black and white makes the image much less complex..

having said all that, ive been using this program for years and i dont see why/how youd use a TGA as a collision. perhaps its a new feature like heightmaps. anyway if its too time consuming for you, there are easier ways to set up a collision

[Mr.Numbers]

If you use a program like Paint.net, photoshop, or anything that has a magic wand tool and layers, this is quite simple.

All you need to do is open one image in the photo editor, then the second one as a second layer. Select the layer with the "Flat" color (The .TGA I guess?) then use the magic wand tool on the area you want to delete. Then select the layer you want to remove the background from, then press "Delete", or use the eraser tool to delete the selected area. You can then delete the .TGA layer and export the image as .png.