Transparency Bug?

[Michio]

I'm back :0

(VX Ace)
I created a custom tile for tileset D, which is basically a puddle. Around the puddle is the transparent colour, so it should show the floor around it in-game.

But when I painted the tile with the editor, behind my puddle displayed the very first sample tile from tileset A (a floor tile, as it appears when you select it with the wall showing at the top of the tile.) This is so random I can only assume it's a bug.

Does anyone know why this happened? My puddle is a similar shade of blue, but I don't think that's the cause...

 

[Andar]

most likely not a bug - if there were a bug with Ace tilesets, that would have appeared before.

I can think of several possible things that might have happened here, but your description is too vague to identify the specific case. Can you give us screenshots of what you have on the map? And show us the tilesheet with the problematic tile?

 

[Michio]

Thank you, I uploaded an image of the puddle where it can be selected in the editor, and and image of how it appears when painted on the map

 

[Shaz]

Could you please show us the Tilesets window, with the tab selected that has this tile on it? Please show the full window - don't crop it. I am interested in seeing something other than the actual tile.

 

[Michio]

Sorry :0

Here's the screen

It just occurred to me that perhaps the problem is I'm using a D tile (the blue one) as a floor tile.
Maybe I can only have something that can be stood over (like a puddle) on top an A tile?

 

[Kes]

You haven't given Shaz the info she needs because you haven't provided the whole of the window. Could you try again with your screen shot, this time without cropping it.
Thanks.

 

[Michio]

Here is the full window:

 

[Andar]

is the tilesheet a full-sized one? which means is the rest of the D-sheet only transparent or is it missing?

The engine behaves strangely with incomplete tilesheets

And Shaz was asking for the tileset windows in the database, not the editor window with the map...

 

[Michio]

Yes, the rest of D-sheet is transparent (as it is custom and I haven't filled it with anything yet.)

I'll try filling the rest of the tiles with a random colour.

Here is the tileset as it appears in the database.

 

[Andar]

how did you set the transparency for that tilesheet? using the alpha channel of a png (true transparency), or did you use the color replacement transparency of the resource importer?

 

[Michio]

When I imported the sheet it asks me to select a colour for transparency and translucency, so I guess the latter?

 

[Andar]

yes, and that might be the cause if that color is not uniform through the background - small variations of the color are enough to leave fragments of non-transparency.

are you experienced enough with image programs to turn that into true transparency of an png picture? You'll need a good image program with support for both layers and transparency to do that, MS Paint would only destroy any transparency for example.

That would be the best option, but if you can't you'll need to fill the background with a uniform color for color replacement transparency to work correctly. And any uniform color is destroyed if using a high jpg compression...

 

[Michio]

Thank you.
I'm using graphicsgale, I'll work out how to export an image with true transparency.

 

[Andar]

1) make a new, empty picture with transparent background and of the same size
2) import the existing image on it in a new layer
3) remove all parts that are non-transparent, but should be transparent
4) save as png

 

[Shaz]

It's not a problem with transparency - note that what's behind the puddle is not a solid colour - it's the water tile from the A tab. You can't make that happen by loading images in the wrong slot or having an incorrectly sized tilesheet or importing vs saving with a transparent background.

Here's what's happened.

It just occurred to me that perhaps the problem is I'm using a D tile (the blue one) as a floor tile.

This is what gave it away - your mention of the blue tile as the floor and being a D tile, but the pictures helped.

You've used the A water tile to cover your entire background. Then you've used the blue tile from D to cover the whole background as well - this gives you two layers - the water tile on the bottom (the ground layer), then the blue tile on the top (the upper layer).

MV gives you two upper layers, but Ace only gives you one. So when you draw over the existing upper layer (D tiles) with other D tiles, they replace what was already there on the upper layer, but they leave the lower layer alone. Therefore, you've got your puddle, but the water from the lower layer shows through in the transparent areas.

Ground tiles should be A tiles. This means you can place things over them. So put your blue tile on the A5 tab and draw with that over your whole map (wherever you don't want the water tiles to be). Then draw your puddle over it.

 

[Michio]

You are a genius :')

 

[Shaz]

Only after coffee

You can report your first post and ask for the thread to be closed if the issue is fully solved.

 

[mlogan]

This thread is being closed, due to being solved. If for some reason you would like this thread re-opened, please report this post and leave a message why. Thank you.