"Die folgende Antort zu QuickRender stammt aus der Wissendatenbank von BricsCad und ist deshalb in englischer Sprache. Wenn Sie eine deutsche Überstzung benötigen, wenden Sie sich bitte an die Htoline: 0611 18 36 -1-112. Wir werden den Text dann übersetzen und ebenfalls hier hereinstellen.

Text aus der Wissensdatenbank von BricsCad:

QRender crashcourse
product: BricsCad
version: all
operating system: All Operating Systems
status:
last reviewed: 2004-11-10

Symptoms
How to use QRender?

Cause

Resolution
QRender stands for Quick Render: it is a real-time renderer that allows walking through a rendered 3D model, using similar techniques as found in today's high-end 3D games.
It was designed with the focus on speed and ease of navigation through the model, not on photo-realism. Texture bitmaps, light sources and shading are supported, cast shadows and reflection not yet.

Please give the navigation keys a try, walking through your model in real time rendered mode is quite a thrill. Recently changes were made to the assignment of the keys. An overview of all navigation keys can be found in the readme.htm that comes with IntelliCad.
An important key input to regain your bearings after experimenting with rotations, is the Ctrl-Home key-in to regain a horizontal bearing.
Another important key is the Esc key that allows toggling back to normal operation mode and non-rendered display (during QRender mode other operations are disabled).

The default setting for QRender is that it displays all elements using shades of grey. In the QRender settings dialog, click the materials tab and you can change this to use the actual colour or material texture that was assigned to the elements.

To define a texture based on a bitmap, click the 'Tile' radio button in the Texture Mapping box of the New Material tab page, then press the Select button to select the desired bitmap file.
For shiny materials like steel or glass, it is overkill to use textures,
you will obtain better effects by defining a material based on an RGB colour combined with appropriate settings for transparency and shininess.

For architectural models, just defining a new material 'glass' with a transparency of approximately 75 %, and attaching that material to the layer on which the glass panes reside, will already give a spectacular effect.
To attach a material to a layer, click the 'By Layers' button and,
while a material is selected in the left column and the desired layers in the right column, click the 'attach' button.

When creating additional texture bitmaps, be aware that the number of pixels for
width and height must be a power of 2, (like 32, 64, 128, 256, ...)
From what I tried for architectural models, 128x128 seems to be a good compromise between size, speed and image quality. This 128 by 128 pixels image should represent a surface of approximately 128 cm by 128 cm. In other words, if the resolution of the image is 1 pixel per cm2 (or better), the quality of the result will be OK for buildings. For smaller objects, textures with a higher resolution should be used.

To keep the size of the bmp files small, it is advised to reduce the number of used colours to 256, this will not influence quality too much: the produced images will contain much more than 256 different colours as a result of the shading nuances calculated for the different lighting situations.

When assigning a material to one or more elements in the dwg, the material definition is stored along in the dwg file, hence if this file is later on rendered on a different machine, the correct textures will be used.

Material definitions can be saved in material libraries.
Please note that scaling may be needed when using library textures:
when a library made for drawings in cm is used for a drawing in mm, a material with size 128 by 128 should be scaled accordingly to 1280 by 1280.

If materials looks too dark in most lighting conditions, try augmenting their ambient light value.

QRender maintains its own view settings, main reason for this is that QRender only handles perspective views for now.
Hence it cannot just take the current view settings and use those when rendering:
most often users are not in perspective mode while designing a project.
When switching to rendered mode, QRender will use the viewpoint that was most recently used when rendering.

By the way, QRender supports to save view points thus allowing easy return to interesting positions."

Texturen im QuickRender?