There has been no luck Wallace. It's the same behaviour. I've closed Gimp and open again after installing it, and nothing.

Here other try.

If there is any kind of extrusion going on then script-fu-compat.init is not the problem. That file contains the "while" macro that's used to loop in the script and I just thought it might be missing, but I was basically grasping at straws. Maybe there is some GIMP default settings that got changed, which might affect the operation of the script. I don't know what settings those could be, though.

Issabella, I can create a test file to hard code the direction values. Maybe that would tell us something.

Thank you so much GnuTux and Wallace for your interest on my problem. I wish you find out something as it's a wonderful useful script.

Issabella, Can you test this version of the script with 225 hard coded (up and to the left)? Just use the gimp text file I posted earlier and run using defaults.

Test Script Removed

Yes, Yes, Yes, I think it works all right now GnuTux!!!!

I've tested all of directions and YES It works fantastic!!!! Thank you GnuTux. I'm happy.

Geeze, I don't see how it works in all directions now.

Instead of calculating the directional values, I hard coded in the direction values for only one direction (225) in that test script.

Are you sure you are getting different results in all directions?

Yes, I can see. I'm going to post my tests. hehehehe It works!!!!

Here you are. hehehehe

It's only one direction. I didn't realise it was the same.

Ok. We are making progress, though.

That tells me the math that I use to calculate the directions is not consistent from PC to PC. Not sure why that's the case, but there is more than one way to skin a cat.

I'll have another script for you to test in just a bit.

@GnuTux
The problem seems to be the (round x) function is rounding negative values lower than -0.5 up to 0 instead of down to -1.
Hence:
- for angles 0, 45 and 90 (where both cos and sin are positive) it works ok;
- for 135, cos gets rounded up to 0 and it produces the same result as 90;
- for 180, 225 and 270, both cos and sin get rounded to 0, so no extrusion is produced;
- for 315, sin gets rounded to 0 so it produces the same result as 0 or 360.

@Issabella
Can you tell us:
- what sort of PC you're using
- what operating system you're using
- what version of Gimp you're using

I think you're correct, jontait2. The question is why the discrepancy between PC's / GIMP installations?

Mi Gimp: 1.6.1.0-beta

Recheck your version of GIMP, Issabella. Should be under Help/About.

2.8.14

Right, so it's an Intel i7 based PC running Windows 7 Professional 32-bit and Gimp 2.8.14. Should be no problem.

@GnuTux
I wonder whether Issabella might have a rogue script-fu-xxx.scm in the system directory which re-defines (round x) to round upwards?

GnuTux, I have no idea what you are speaking. I'm going to see if I have some named like that.

Well, that is a possibility, jontait2.

It seems gimper66 was having the same problem and just decided to reinstall GIMP, which fixed the problem for him. That doesn't lead me to what is actually causing the problem. I believe he removed all the .scm scripts from his system, except the extrusion script, but still had the same problem.