Transport Tycoon Forums

In attempting my first TTD graphics mod (simply trying to replace that hideous checkerboard terrain in toyland), I've run into a problem converting the pcx back to grf. The pcx looks fine, I changed no sizes nor added/deleted sprites, merely gave the ground tiles a consistent grassy appearance; but when trying to recompile the file I get:

Error: invalid compression, data diff at 2992 of 2996 bytes, even uncompressed, aborting.

Now what?

How are you running grfcodec? What options?

I used the default settings as explained in the docs to generate the pcx and nfo files. I edited the former (didn't touch the latter) and used the default settings to (attempt to) recompile the grf. This was done in a dos window opened in the grfcodec directory.

jgf wrote:default settings ... default settings

Just as "latest" is not version number, "default" is not a setting.

What, *exactly*, did you type?

I am not at my home computer so don't have the docs handy. By default I meant I typed exactly what the docs said to recompile the file; I used no additional switches.

FTR:

I typed: grfcodec -d trgt.grf

to create the pcx and:

grfcodec -e trgt.grf

to create the new grf

I got the error message; though a new grf was created it wouldn't load.

Very strange... it seems that for some reason your PCX edits cause grfcodec to be unable to properly compress the sprite, even with compression turned off. I have no clue what could be causing that...