Color rendition in Open GL

[Tom Krowka]

I'm using a tan siding on a residence. In the Archicad rendering engine, the color is perfect. However, in the Open Gl, the color looks like its washed out to white or grey. I've tried adjusting the sun intensity, ambient, etc. to no avail.
I am trying to produce a VR walkaround the house for the Review Baord to show accurate colors. All the other colors are fine (brick, copper, white trim)
Is there any way to turn the sun off? Maybe it's too bright.

[MMontgomery]

You might check out the 'specular' and 'shininess' of the material. Those can sometimes brighten materials a bit too much if they are set too high.

[Anonymous]

I have found that when you make your own material, lets say 10 shades of tan, or green. Small bitmap files and create your own materials within ArchiCAD. Then apply them to your object. Now you will get a faithful rendition of the object with the ability to shade parts of your object in fine detail.

In other words, a texture color is high fidelity, a color set within ArchiCAD gives different results with different OpenGL cards.

Of course this observation could be wrong, but at least that is what I think of this situation.

[David Pacifico]

Tom wrote:
I've tried adjusting the sun intensity, ambient, etc. to no avail. All the other colors are fine (brick, copper, white trim)
Is there any way to turn the sun off? Maybe it's too bright.

You might try changing the color of the sun and the ambient light. This will effect all the materials thou. (Dwight tip)

The VR Scene uses the photorendering engine which is different than the OpenGL in the 3D window. So if it looks right photorendered you should be OK. VR objects can use either. I find that I pump up the ambient for OpenGL

[Anonymous]

I originally posted this at the C4D topic:


I offer this up on my server for those of you who can show me a better way. <---- Challenge

I have a file at:

http://www.Burginger.com/ARCHICAD_TALK/COLOR_TEXTURES.sit

WARNING - 17 MB

Now here are my observations:

#1 - I use color textures like these to color my projects in ArchiCAD because it allows me to control the exact colored appearence of an object in the ArchiCAD OpenGL window. (Good for Presentations of work in progress)

#2 - The 7+3 character format [Object = Group Name] fits the import/export options for 3ds.

#3 - The texture name stays legible in C4D after import allowing the drag and drop of textures onto objects to go quicker.

#3 - The central folder for textures allows me to point C4D at the same folder and the imported model retains the same look that it had in ArchiCAD.

Questions:

#1 - Is there a way to automate the creation on MATERIALS in ArchiCAD. I currently clone a material, rename, add texture image. - Move - on to the next. Very slow and boring.

#2 - Is there a way to automatically have the textures attach to the objects after import in C4D. This I haven't played with this too much. Eh, Stefen ?

#3 - Can the solid color textures be smaller in ArchiCAD than 124 x 124 ? Like perhaps, 1 pixel x 1 pixel? Again I have not tested this yet.

This whole thing is a work in progress and I offer it here for improvement because it takes so darn long to perfect such a systematic method of texturing. A helping hand would really boost my efforts.