Indigo 1.0.4

[Kram1032]

Ah, I see

@Roger: try to use a "B" value of -1... maybe, it's less transparent, then.

(negative values should invert the colours)

[Roger]

I'll try that. Thanks.
In the meantime... I'm working on another scene where I need transpiracy on an object. It works horay, but the shadow is still solid. Here's my material. Any idea's? Am I just too impatient for there are some white dots there...

[Kram1032]

Wow, the shadows actually aren't *that* solid

Well... I guess, you used BiDir, right?
BiDir doesn't like alpha mapped stuff and loves to play a trick on the users scene, by simply ignoring the parts, where the object is supposed to not throw any shadows

But it looks like Ono managed to deal with BiDir, so that at least a few light rays go through

[Roger]

If I turn off BiDir or just type false instead of true behind bidir in the igs file, Indigo crashed when I run it...odd.

Anyways, when I render it for some more time, it works ok.

Now another thing, I hate bumping this threat, but I'd hate making a new threat for this problem: I used this bumpmap with these settings:

Code: Select all

	<material>
		<name>Material</name>
		<diffuse>
			<albedo_spectrum>
				<rgb>
					<rgb>1 1 1</rgb>
					<gamma>2.2</gamma>
				</rgb></albedo_spectrum>
			<albedo_texture>
				<path>btn.jpg</path>
				<uv_set>uv</uv_set>
				<exponent>2.300000</exponent>
				<a>0</a>
				<b>1</b>
				<c>0</c>
			</albedo_texture>
			<bump_map>
				<path>btnb.jpg</path>
				<uv_set>uv</uv_set>
				<exponent>0.1</exponent>
				<a>0</a>
				<b>0.1</b>
				<c>0</c>
			</bump_map>
		</diffuse>
	</material>

but when I render it I get this result.

See the somehow odd visible pattern in it witch isnt in the bumpmap. any idea where this comes from? when I turn bumpmapping the texture (the other texture, the diffuse map) looks just fine

[dougal2]

to use bidir off, you need to remove the aperture_diffraction line as well, regardless of whether it's true or false.

[alex22]

That pattern is made by jpeg artifacts. Try to avoid using jpeg with bumpmaps, use png or very high jpeg quality.

[kadajawi]

Has anyone actually tried zone plates in Indigo? Shouldn't it work?
http://ca.geocities.com/penate@rogers.c ... plate.html

[Kram1032]

Sounds interesting...
Indigo only supports the standard model, but it might work, if you use that image as a custom aperture

for example this
http://upload.wikimedia.org/wikipedia/c ... osinus.png

[dougal2]

I don't think ZP will work, as far as I know diffraction is not modelled.

[Kram1032]

By short-time-searching, I got as far as this...
http://arxiv.org/ftp/physics/papers/0701/0701210.pdf
though, there's no bug image and yet no Wiki article or anything like that.