Bluefish444 Create3D Bedienungsanleitung PDF herunterladen (Seite 99)

file in memory, while AVI is being read from the hard disk. The former solution consumes a lot

more memory and its size can be restricted, but it is much safer and faster to play. Frame indexes

of sequence files can be animated in any way you like, you can even place loops in the

animation, while this is a lot more difficult with AVI files, particularly with those with interframe

compression.

Therefore if you have a sequence that has a relevant alpha channel or is not too long (I.e. not

minutes or hours long), it is advisable to build a sequence from it and not use it as an AVI.

The sequence is a series of bitmaps, usually created in an animation application and can be

found in the same folder. The file name includes the serial number:

name0000.tga

name0001.tga

name0002.tga

There are four kinds of sequence files according to its expected size (affected also by the size of

the image and the number of images):

● Uncompressed:

The elements of the sequence are built uncompressed in the sequence file. The final size

of the .nsq file in this case would be more or less the same as the size of all the images

added to each other. This is an optimum solution in terms of speed because it needs the

least amount of resources, on the other hand it consumes more memory. Choose this

with shorter sequences or with a smaller image size.

● Hardware compression (DXT1 or DXT5):

This type of compression is done in the GPU and it is very fast to play back. The amount

of compression is fixed, it is 6 :1 in case of 24-bit images and 4:1 for images with an

alpha channel. Although the compression is lossy, for most cases it is hardly if at all

noticeable and playback can be even faster than with the uncompressed image

sequence type because less amount of data has to pass from system memory to the

memory of the GPU. Unless you don't like the result for some reason, this is the

suggested sequence type you should almost always use.

● Lossless compression:

This is an RLE (run length encoded) type of compression which results in absolutely no

loss in quality and it is very fast to decompress. Also, it results in a smaller file size

compared to uncompressed, but the amount of memory you can save by using this

option very much depends on the content of the image.

● Lossy compression:

Compression is Jpeg based. The quality of compression can also be defined (between

'bad' to maximum from the list, the lower in quality is also the smaller in size.) This

procedure ensures the greatest saving of memory, but it is by far the slowest to

decompress.

● Start from chosen frame:

In default it is irrelevant which member of the sequence you select with Browse because

the application will use all other files of the same name, differing only in the serial

number. If, however, you use this option, only the file selected and those that have the

same name and higher number will be converted to a sequence.

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Bluefish444 Create3D Bedienungsanleitung Seite 99