brice3d.iso (from archive) is 32 bit, so if you have Win7 64 bit it won't install. You can try to use OTVDM https://github.com/otya128/winevdm/releases (and double click the otvdmw application in the folder and open the bryce3d setup.exe, but it will probably say it must be installed from the CD, so this doesn't work. However, you still will need otvdmw.

So install WinCDemu https://wincdemu.sysprogs.org/download/ . Now r-click the Bryce3d .iso and ‘select drive letter & mount’ then just leave it as it is ‘v:’ and ‘data disc’ are fine, so click OK. Options pop up so click ‘Open folder to view files’. Now you need that otvdmw. Open the OTVDM folder again and double click otvdmw and then find the setup application file in your newly mounted virtual CD Drive (V:). It should now load Bryce3D like an application.