Up

Entries:

1

2

3

4

setup

RIB Setup

To help debug shaders, I usually reduce the anti-aliasing performed by the renderer. Leaving the anti-aliasing on will tend to cover up problems in the shader. For 3Delight, this can be done by adding the following options to the rib file:

PixelSamples 1 1
Hider "hidden" "jitter" 0
PixelFilter "box" 1 1

Here are a couple of images showing the difference between the two settings, using a very simple surface shader:

Before

After

Ci = 0.5*step(t, s);

Quick Note: There are some jpeg compression artifacts in these images so the non-supersampled version doesn't look as aliased as it really is.

Up

Entries:

1

2

3

4

setup