Path: chuka.playstation.co.uk!news From: "Ben James" Newsgroups: scee.yaroze.freetalk.english Subject: Re: Dealing with black pixels Date: Thu, 26 May 2005 19:48:57 +0100 Organization: PlayStation Net Yaroze (SCEE) Lines: 37 Message-ID: References: NNTP-Posting-Host: host81-151-217-193.range81-151.btcentralplus.com X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2900.2180 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 Hi Scott, here's a table from Sony's documentation on the subject. Hope it makes sense :) -Ben Table 2-1: STP Bit Function in Combination with R, G, B Data STP/R,G,B Transucent processing on Translucent processing off ----------------------------------------------------------------- 0,0,0,0 Transparent Transparent 0,X,X,X Not transparent Not transparent 1,X,X,X Semi-transparent Not transparent 1,0,0,0 Non-transparent black Non-transparent black ----------------------------------------------------------------- "Scott Cartier" wrote in message news:d755np$6n1@www.netyaroze-europe.com... My memory is a bit fuzzy on the subject. Can anyone tell me how the Playstation deals with black pixels with/without the STP set? I remember that for non-translucent sprites a black pixel with STP=0 will be treated as transparent and one with STP=1 will be opaque. But what about translucent sprites? I'm guessing that translucent sprites treat black pixels with STP=0 as fully transparent and STP=1 as translucent black (not opaque). Can anyone cofirm? STP=0 STP=1 +--------------------------------- Non-translucent sprite | Transparent Opaque black Translucent sprite | Transparent Translucent black Scott