Tests with painting on glass

Borgleader · Post by **Borgleader** » Mon Jul 28, 2008 7:52 am

Holy crap!!!

MUST TRY!

Whaat · Post by **Whaat** » Mon Jul 28, 2008 2:22 pm

cool...since when can we blend two media together???? 1.1.7??

Big Fan · Post by **Big Fan** » Mon Jul 28, 2008 4:38 pm

why is there a step_blend statement in there? there is no null
also I am a bit hazy about what the former does anyway - and no it is not in the manual...

Post by **OnoSendai** » Mon Jul 28, 2008 6:00 pm

Whaat wrote:cool...since when can we blend two media together???? 1.1.7??

You could always blend together two materials sharing the same internal medium, providing that they aren't both delta-distribution scatterers (specular).

Post by **OnoSendai** » Mon Jul 28, 2008 6:01 pm

Big Fan wrote:why is there a step_blend statement in there? there is no null
also I am a bit hazy about what the former does anyway - and no it is not in the manual...

It seemed to reduce the noise a bit.
if step blend is enabled, the following function is applied to the blend factor:
f(x) = 1 if x >= 0.5, else 0

tony · Post by **tony** » Sun Aug 10, 2008 12:45 am

I still doing tests with Indigo 1.0.9.3:

1. Texture 'blackrose_pattern.jpg' (BbB) on 'bump' of Specular transparent.

2. Material EtchedGlass from BbB.

3. Material EtchedGlass + bump in Specular transparent. It darkens the whole scene. Is it possible somehow?

Greetings.

CTZn · Post by **CTZn** » Sun Aug 10, 2008 1:08 am

Very nice demonstration of jpg in scalar plots in the first pic ! NEVER use jpgs for bump, displacement, etc. Jpgs are good for COLOR coding only. Jpg compression algorithm is perceptual, as such it is rather inefficient to restitute fine details (speckles ?). I'm reffering to the shadows, that's not a bug just jpg. The bump effect itself is great imo !

the image darkening suddently is possible only with Reinhard tonemapping, because it adapts itself automatically. This happens when a very bright part of the image (even a single pixel!) appears, pushing the less exposed bits in the dark. The two others tm algo will be consistent over time.

tony · Post by **tony** » Sun Aug 10, 2008 2:27 am

Precisely, CTZn:

The new rendering (3) with Linear tonemapping.

But shadows are not correct.

tony · Post by **tony** » Mon Aug 11, 2008 1:17 am

I have retouched the mask and I have saved as .png

Now I see better the bump and also the shadows.

neo0. · Post by **neo0.** » Mon Aug 11, 2008 9:09 pm

Here's my test..

Tests with painting on glass

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