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[1.12] Block with layered textures?


Kinniken

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Hi all,

 

I'm trying to have a block that renders with two textures on each side, a background layer and an overlay that's a partly-transparent PNG.

 

From what i read online I figured this should work:

 

Base model:

 

{
	"parent": "block/block",
	"textures": {
		"overlay": "millenaire:blocks/source_overlay",
		"particle": "#block"
	},
	"elements": [
		{
			"from": [ 0, 0, 0 ],
			"to": [ 16, 16, 16 ],
			"faces": {
				"down":  { "texture": "#sourceblock", "cullface": "down" },
				"up":    { "texture": "#sourceblock", "cullface": "up" },
				"north": { "texture": "#sourceblock", "cullface": "north" },
				"south": { "texture": "#sourceblock", "cullface": "south" },
				"west":  { "texture": "#sourceblock", "cullface": "west" },
				"east":  { "texture": "#sourceblock", "cullface": "east" }
			}
		},
		{
			"from": [ 0, 0, 0 ],
			"to": [ 16, 16, 16 ],
			"faces": {
				"down":  { "texture": "#overlay", "cullface": "down" },
				"up":    { "texture": "#overlay", "cullface": "up" },
				"north": { "texture": "#overlay", "cullface": "north" },
				"south": { "texture": "#overlay", "cullface": "south" },
				"west":  { "texture": "#overlay", "cullface": "west" },
				"east":  { "texture": "#overlay", "cullface": "east" }
			}
		}
	]
}

 

And the actual model:

 

{
  "parent": "millenaire:block/source",
  "textures": {
    "sourceblock": "minecraft:blocks/stone_granite"
  }
}

 

(The intention being that the overlay is always the same, but the background texture can change for different blocks)

 

In practice all that shows my overlay on a white background, despite it being a PNG with a transparent background.

 

Any ideas? Thanks!

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Minecraft renders blocks with transparency disabled by default, you need to tell it to render your block in a different layer to use transparent textures.

 

Do this by overriding Block#getBlockLayer to return CUTOUT, CUTOUT_MIPPED, or TRANSLUCENT as appropriate. The Grey Ghost explains the difference between the layers here.

 

Grass (BlockGrass) uses a model like this with CUTOUT_MIPPED.

Please don't PM me to ask for help. Asking your question in a public thread preserves it for people who are having the same problem in the future.

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1 minute ago, Kinniken said:

Thanks, that works!

 

However, that means that blocks rendered that way have the performance cost of partly-transparent blocks even if they are actually totally opaque?

 

I believe so, yes. I'm not sure if it makes much difference, Minecraft uses Grass everywhere and the game still manages to run.

 

You can also use a multi-layer model (forge:multi-layer) that renders a model with the opaque base texture in the SOLID layer and another model with the transparent overlay texture in the CUTOUT_MIPPED layer; but this is probably overkill for a simple model like this. This requires overriding Block#canRenderInLayer to return true for the layers that the block can render in.

Please don't PM me to ask for help. Asking your question in a public thread preserves it for people who are having the same problem in the future.

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Good point about grass...

 

Another small thing, I have it in place and it works fine, however I'm running a 64x texture pack. For some blocks, it's taking the texture from the pack, for some, it's taking the Minecraft one.

 

For example, this one uses the 16x texture:

 

{
  "parent": "millenaire:block/source",
  "textures": {
    "sourceblock": "minecraft:blocks/stone"
  }
}

 

And this one the 64x one:

 

{
  "parent": "millenaire:block/source",
  "textures": {
    "sourceblock": "minecraft:blocks/gravel"
  }
}

 

Whether the overlay is 16x or 64x from a custom resource pack doesn't seem to make any difference.

 

 

2018-03-17_18.11.36.png

Edited by Kinniken
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11 minutes ago, Kinniken said:

I guess I should have posted this instead ;)

 

That doesn't answer my question completely. It's possible that the resource pack replaces the minecraft:stone blockstates file or the  minecraft:block/stone and minecraft:block/stone_mirrored models with models that use a different texture name rather than replacing the minecraft:blocks/stone texture.

Edited by Choonster

Please don't PM me to ask for help. Asking your question in a public thread preserves it for people who are having the same problem in the future.

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